Powers and abilities
- Screech (Screechy): Stuns any contestant who's targeted by said screech. It can also generate hearts when Four shows love or excitement towards something, which can fling a contestant as shown with Eraser on bfb 4.
- Zaps (Zappies): Beams that shoot out of their hands and electrocute anybody who is hit by them, making them "lose health". Although Four has to seemingly charge up at times (possibly for a longer duration), he can also fire them instantly.
- Advanced-level reality-warping: Four can create objects such as cakes, buttons, pillars, Paper Planes, buzzer boxes, soup, orange dye, and jawbreakers out of thin air. Not only can they revive contestants, but he can also revive them in a place other than his hand, as seen in "Lick Your Way to Freedom" when he revived the contestants in giant jawbreakers, which he also created. Also, as seen with the paper planes in "Fortunate Ben", he can likely manipulate the laws of physics.
- Gravity manipulation/Gravitokinesis: Donut, while inhabited by the factor of Four, was able to turn on and off the effects of gravity ("Questions Answered"). This ability can be refined to only affect certain entities, as Donut only manipulated gravity's effects on the moon.
- Four was able to crush down a planet-sized Black Hole into a significantly less voluminous state and near nullifying Black Hole's normally intense gravity, allowing Black Hole to compete.
- Shape-shifting: As shown in "What Do You Think of Roleplay?", both Four and X can shape-shift, or change their physical appearance. Also, they can change the shape of other characters as well as seen on "What Do You Think of Roleplay?".
- Size manipulation: In "Return of the Rocket Ship", Four grows to an absurd size in response to Pillow's criticism. Also in "The Tweested Temple", Four grows to an extremely large size after Four receives Gelatin's cursed totem and declares he is up for elimination.
- Brain manipulation: In "What Do You Think of Roleplay?", Four displayed the power to augment and transfer the brains/personalities of the contestants into each other; however, instead of going back to their original bodies, the body that the person's mind was in shape-shifted into that mind's original body.
- Perspective violation: Four can violate common 2D perspective laws such as sliding in front of objects on the ground and suddenly switching to behind objects on the ground.
- Incredible volume: Four can raise his voice so that it can even be heard through the far reaches of space, as shown in "The Four is Lava".
- Controlling and morphing clouds: He has used this to time contests that require a time limit to show how much time is currently left.
- Earthbending: In "Take the Tower", Four rose his hands up to cause 2 hills to rise under the team's towers.
- Gravity manipulation/Gravitokinesis: Donut, while inhabited by the factor of Four, was able to turn on and off the effects of gravity ("Questions Answered"). This ability can be refined to only affect certain entities, as Donut only manipulated gravity's effects on the moon.
- Malleability: As seen in "Enter the Exit", "The Four is Lava", and "Take the Tower", Four's body and limbs can stretch to extreme distances and can change shape at will. He can also contract extremely thin in "The Escape from Four".
- Recovery: Four replaces the Recovery Centers from previous seasons by using only his hand to recover contestants and numbers. As shown in "Lick Your Way to Freedom", they can recover them in places other than their hand
- Mutilation: Turns any contestant into an abstract version of themselves, killing them. A harp strum plays in the process.
- Elimination: Four replaces the Tiny Loser Chamber and Locker of Losers from previous seasons, by sucking up eliminated contestants or "eating" them. From there, the eliminated contestants are sent to Eternal Algebra Class Withfour (EXIT). EXIT also appears to be an alternate plane of existence, because the contestants probably shrink.
- Inception/Astral projection: Four cannot only enter themself to talk to the "exitors", but is also able to still do that when he is already inside themself, as shown when he inserted his arm inside themself again to pick up Leafy in "Get to the Top in 500 Steps". His arm also appeared to be larger than normal, which suggests that anything that enters shrinks (except Four).
- Super-speed: Four can fly at extreme speeds, as shown in "Enter the Exit".
- Teleportation: He can teleport whenever a "4" has been played shown in "Today's Very Special Episode". He could also teleport others with a snap of his fingers in "What Do You Think of Roleplay?".
- Incredible strength: In "Questions Answered", Donut is seen pushing the entire Earth (the Earth's weight is kg, or lb) into his camera using only his feet via the factor of Four. This trait also applies to Four's ability to warp reality. Four was also able to stop the FreeSmart Supervan just by putting his hand out, crushing it in the process.
- Dismemberment: This happened off-screen when X interrupted Four. They had snapped off X's leg. This is unknown to be a power or not, however, as it wasn't known exactly how Four snapped X's leg.
- Flight: In "Enter the Exit", Four was able to fly over to the Waterfall to eliminate Roboty.
- Regeneration: In "Enter the Exit", when the contestants were recovering Four, he was in a liquidated state up until the point when he was reformed back to normal.
- Fire resistance (external): Four is able to stand on the lava and dig his hands into it as well.
- Thought manipulation: During the Cake at Stake in "The Four is Lava", Four displayed the ability to create positive thoughts (or happy thoughts) and send them to the safe contestants of Bleh
- It is unknown if Four can create any other thoughts at the moment
- Intelligence: Four can understand Insulavoric (Dora's language), Roboty's Morse code, Teardrop's sign language, and Woody's speech perfectly even though Insulavoric is supposed to be one of the hardest languages to learn.
- Airbending: As shown in "A Taste of Space", Four can give people air, even in the vacuums of space.
- Brain scanning: As shown in "Who Stole Donut's Diary?", Four shoots a laser (similar style to Zappies) at X's head and receives their thoughts to find out who stole Donut's diary.
- Incredible hearing: As shown in "A Taste of Space" and "Fashion For Your Face!", Four's ears are able to hear from miles away, up to the sun.
- Telekinesis: Just like X, Four can make things float by snapping their fingers, as shown in "The Game Has Changed".
- Despawning: As shown in "The Game Has Changed", Four can "despawn" a contestant by bringing them off-screen which results in them dying. While the method of how he does it is unknown, we see a white glow where he is despawning them. This ability was further explored later on. As shown in "The Tweested Temple", laser gun sounds play when Four despawned X.
- Factorization: Four will become incapacitated if he gets multiplied with 0, or anything that simply resembles a 0. If he comes into contact with the insides of Donut (zero), he will turn into a liquid until taken out and squirted back into his normal shape.
- Limited stamina/Exhaustion: Four was unable to eliminate and suck in Spongy completely in "The Escape from Four", possibly due to Spongy's massive size.
- Burn tolerance: Four can become incapacitated if he comes into contact with fire (presumably from the inside, which is unusual given his resistance to lava), and receives a psychedelic effect.
- Battle for BFDI/BFB
- "Getting Teardrop to Talk"
- "Lick Your Way to Freedom"
- "Why Would You Do This on a Swingset"
- "Today's Very Special Episode"
- "Fortunate Ben
- "Four Goes Too Far"
- "The Liar Ball You Don't Want" (does not speak)
- "Questions Answered" (voice only)
- "This Episode Is About Basketball" (flashback)
- "Enter the Exit"
- "Get to the Top in 500 Steps"
- "What Do You Think of Roleplay?"
- "Return of the Rocket Ship"
- "Don't Dig Straight Down"
- "The Four is Lava"
- "The Escape from Four"
- "X Marks the Spot"
- "Take the Tower"
- "How Loe Can You Grow?"
- "A Taste of Space"
- "Let's Raid The Warehouse"
- "Who Stole Donut's Diary?"
- "Fashion For Your Face!"
- "The Game Has Changed"
- "The Tweested Temple"
- "The Hidden Contestant"
- "Uprooting Everything"
- "B.F.B. = Back From Beginning" (last appearance)
- "SOS (Save Our Show)" (in MS Paint)
- Non-canon appearances
- "Thanks for 4 years of Thanks for 4 years!"
- "Happy Birthday, Battle for BFDI!"
- "Thanks for 600,000 subscribers!"
- "Thanks for 700,000 subscribers!"
- "Thanks for 800,000 subscribers!"
- "PUMPKIN 2.0 - BFDI Halloween Shorts"
- "If Among Us Was a BFDI Challenge"
- "We asked TikTok to VOTE the best object - BFDI Mini"
X Finds Out His Value
Battle for BFB
Nine years later, Four and X appeared in Battle for BFDI as the hosts in " Getting Teardrop to Talk". Four first appears, grabbing Black Hole as he slowly begins crushing him in his fist, making him smaller. The objects are confused as to what he is, Liy tries squishing him. Four then mutilates Pin to show off what he can do. Four starts screeching the contestants until Dora says something to him that he understands. Pillow suddenly attacks Four but ends up dying in the process. Bell mourns Pin and Pillow being dead until Four shows that he can recover the dead.
Four then asks if the contestants want to play a game, presenting them with a chance to win A BFDI. Everyone unanimously cheers over the prize, so Four has then split into 8 teams of 8. When they are finished, Four tells them the first contest, which is to get X's baskets back to him. iance loses the contest and Four tells the viewers about the new form of voting with square brackets.
In "Lick Your Way to Freedom", Four begins Cake at Stake for iance and sucks Pencil up when she receives the most votes. Afterward, Four ends up crowded by contestants who want their dead teammates back. He angrily states that he'll recover only one person, who ends up being Tennis Ball. The contestants are still angry, so Four shouts that the contest is freeing their dead friends from jawbreakers. Once seven teams are safe, Four tells Beep that voters aren't safe, tricking them before saying they aren't safe.
In "Why Would You Do This on a Swingset", Four is hit by forks thrown by Gelatin and uses the Zappies on him, not completely killing, however, as X interrupts to him to start the intro. Four does so reluctantly. Four does "Brake at Flake" with Beep, giving Earths as cakes. Balloony reveals that he somehow knows about Eternal Algebra Class Withfour, which makes Four suspicious. Leafy ends up eliminated so Four sucks her up. Just as Four is about to announce the third contest, X arrives saying he's back. Four tells him nobody noticed he was gone, making X cry. Four then tells the contestants to get on their team swings and swing in circles 50 times to win. Team Ice Cube! loses the contest.
In "Today's Very Special Episode", Four asks Donut where his team is when he's the only one who showed up for Cake at Stake. Because Bracelety falls on Four's mouth, X hosts the Cake at Stake. Bracelety is eliminated so Four sucks her in through his mouth. Because it is the 4th episode, Four has the challenge be to make over him. Meanwhile, Death P.A.C.T. spends most of the challenge trying to keep forks from hitting Four, in order to avoid getting zapped. Four ranks Pen's drawing as the worst and has his team lose.
In "Fortunate Ben", Four has Death P.A.C.T. assemble for Cake at Stake. Liy ends up getting eliminated, but not before X shouts "Hi Pie, bye Liy", making Four angry enough to rip X's limbs off offscreen. Four is then shown screeching Lollipop and telling Book that X went to the Limb Reattachment Center. Four announces the contest, which is to avoid being the first team to have their plane hit the ground.
In "Four Goes Too Far", Four starts the episode by screeching Yellow Face, killing Foldy, and zapping Stapy. This gets the attention of A Better Name Than That, who decides something needs to be done about Four. Before Four can say who is eliminated, Nickel asks him a question that Four takes as criticism, and begins charging his hand to zap him. Four ends up getting multiplied by A Better Name Than That and Zero, which makes him disappear.
In "Questions Answered", a recording of Four's screech is played on an audio recording.
In "Enter the Exit", Four's liquefied body is revealed to have been inside of Donut's body, which is sucked out through a syringe by Firey. Pin manages to squirt him out perfectly and is recovered. Four then gives her a token of gratitude. With Four back, he is able to revive the dead contestants and suck up the ones who were eliminated while he was gone, along with killing Clock offscreen. Four later shows up in the EXIT and announces that a contestant will rejoin.
In "Get to the Top in 500 Steps", Four hosts the first rejoin. Leafy gets the most votes, so Four stick his hand into the EXIT to grab her. He then places Leafy on The Losers!, in exchange for her gratitude token. Four then announces the 11th contest, after being reminded by X that there isn't a 10th contest. He gives the team's time to pick their runners and then starts the challenge. Four later recovers Pie so that she can continue running for her team.
In "What Do You Think of Roleplay?", Four and X switch bodies to fool the contestants. However, the contestants notice that they're acting differently, and their cover is blown when X recovers Bubble. Four then announces the contest.
In "Return of the Rocket Ship", Four reluctantly allows Ice Cube to watch Cake at Stake and tells the viewers to recommend a character. Four then proceeds with the Cake at Stake for Team Ice Cube. Later, Four and X are shown standing still for a while until X bursts through the ground. After eating Pillow, Four says the contest is to find X's treasure before X does. Four later eats the rest of Death P.A.C.T after Pen says that 5 is greater than 4.
In "Don't Dig Straight Down", Four allows Free Food to turn in fake emeralds in order to be safe. He also allows multiple teams to turn in the same emerald that A Better Name Than That found first. Four isn't seen again until the ending, riding on Spongy's ship in space after Woody fell into his eyeball.
In "The Four is Lava", Four gathers Bleh together for cake at stake. The challenge to make your way to them is won by Bleh because they were there for Cake at Stake. Team Ice Cube is put up for elimination because not all of their team-members made it to Four.
In "The Escape from Four", Four recovers all of the remaining dead contestants and starts Cake at Stake for Team Ice Cube. Spongy ends up being eliminated, so Four attempts to suck him up. Spongy's body is too big however, so Four is only able to suck him halfway, and begins to struggle with getting the rest of him. The contestants take notice of Four struggling with something and line up to watch. Some of the eliminated contestants suddenly pop out from Spongy's holes, with Loser escaping completely. Four is angry to see this and begins sucking them back in, while at the same time, the contestants pull on Spongy too free the Exitors. Four manages to pull the Exitors back in, but becomes incapacitated after coming in contact with Firey Jr's fire, allowing the contestants to pull Spongy free. Once Four gets his bearings, he chases Spongy and Loser to send them back to the EXIT. Out of no where, Two lands from the sky, interrupting Four's chase, and begins to convince the contestants to quit Four's show for his instead. Four attempts to get the contestants to come back with a brand new prize called A BFB, but this only causes him to lose even more contestants on his show. Four gets increasingly more upset to the point where he tells X to go to Two's show, feeling X was gonna leave him anyway. Four ends up with only 14 contestants remaining on BFB, and he and his crew get zapped by Two to an area Elsewhere on Earth.
In "X Marks the Spot", Four gets angry at Lollipop and Balloony for doing high-fives instead of high-fours. Balloony points out how he only has one hand, so Four forcefully pulls out five fingers from Balloony's hand. Taco tries to get Four to explain what's happening with the competition, but Four becomes too upset to continue the show since X isn't with him. Four asks if any of the contestants want to help him get X back, but they all refuse. Four manages to change their minds when be brings back the original BFDI as a prize. Four then splits the contestants into two teams and makes the challenge to retrieve X. The X Colored Team end up winning the contest since X marked the spot Loser left. At the end of the episode, Four hugs X, happy to have him back.
In "Take the Tower", Four tells Flower that it's elimination time, Flower responds with telling Four that she isn't in the team that's up for elimination. During Cake at Stake, Four shames the Four Colored Team for disappointing his color by losing. Four explains how the contestant with the least votes is going to be eliminated. Lollipop gets confused because she thought that the contestant with the highest votes will lose. Four screeches at Lollipop, incapacitating and stunning her. X gets mad at Four because Four promised to never screech again, Four apologizes and pats Lollipop. Balloony encourages Four to give more comforting pats, as she isn't waking up. Four gives too many comforting pats, shattering Lollipop's head and killing her.
Four then announces that X is going to read the votes. Balloony gets eliminated and asks to be sucked up by Four. Four tells Balloony that there are no more empty spots in the EXIT and says that he'll be going to BRB. Four recovers Lollipop and Bubble. Bubble, seeing that her friend Balloony is being sent to the BRB, makes a tower to catch Balloony. Four attempts to stop this by telling Lollipop to stop her. Lollipop rejects Four's commands, saying that Bubble is her teammate. Blocky volunteers to take down Bubble, but Four catches him and says that they shouldn't fight unless it's during a competition. Four then makes a tower for the Four Colored Team and raises both towers on hills. Four explains that the contest is to knock down the other team's tower. At the end of the episode, X and Four determine which team won and is up for elimination based on the status of the towers. Along with also giving the team's their official names.
In "How Loe Can You Grow?", Four stops the FreeSmart SuperVan, claiming that it has driven over X's Aloe Vera plants 73 times. Four and X announce to the contestants that they need to respect X's Aloe Vera plants more, Firey agrees and reminds them to do Cake at Stake. Four then does Cake at Stake with the Have Nots, where Spongy gets eliminated and sent to the BRB. Four wants to help X, so Four makes "improving the sun" the contest. Four also explains that there are points, the team that has the most points wins the contest.
Ruby uses herself as a lens to make X's Aloe Vera plants grow, Gelatin tells Teardrop to tell Four. Teardrop runs to Four and tells him what is happening using Teardrop Sign Language, which Four understands perfectly(?), and quickly runs to the scene, Four then gives 1 point to the have cots for improving X's Aloe Vera plants, but Ruby accidentally lights one of the plants on fire, causing Four to give the Have Cots -2 points.
The Have Nots uses Spongy's Spaceship to shoot a laser at the sun, causing it to become brighter. Four notices the effect it had on X's Aloe Vera plants and gives the Have Nots 5 points, then Four notices that X is burning, Four gives the contestants ice buckets, which they use to cool the sun next episode. Four proclaims that X's Aloe Vera plants are taller than him, and announces that the contest has ended with the Have Nots' winning. In the stinger, X tells Four that all of their problems are not solved, Four then tells X that their problems would be solved in next month's challenge.
In "A Taste of Space", Four proclaims that the Have Cots' tablet has been hacked. Four then distributes air as cake for Cake at Stake through video call, in which Ruby gets eliminated, Four rejects Ruby's plea to stay in the game please please, then sends her to the BRB. Four asks where all the contestants are, with X responding that they are either in space or dead. Recovers Flower, Loser, Taco, Blocky, and Woody. Four then asks X what the contest of the episode would be, X tells Four to help them get colder, Four announces that the contest is to make the Sun colder. Four sarcastically asks if the Have Nots enjoyed their last journey to space. Blocky tells a joke to Four, which Four responds with mutilating Blocky and reviving him. In the middle of the contest, Blocky complains to Four that they're gaining and losing points for no reason, then Four gives 6 points to Blocky for being a fly guy. Four also proclaims that Lollipop's strategy of spitting on the earth to cool it down is gross. Four then give Gelatin, Woody, and other contestants minus points.
Four announces that time is up and that the Have Cots have minus 90 million points, and the Have Nots have minus 100 million points. Leafy then pours a bucket of ice onto X, ending X's painful ordeal, Four congratulates the Have Cots for saving X from burning and announces that they have won the contest. In the stinger, Four tells X that they have done a magnificent job at making a garden, the camera then shows Flower in a pot.
In "Let's Raid The Warehouse", Four announces that it's time for Cake at Stake for the Have Nots, in which Loser gets eliminated. Four proclaims that BFB is in it's final 10. Four also announces that the contest is to steal products from the Yellow Face's Warehouse, then give the gifts to the gift receivers of their own team. Four tells the buyer contestants that they have to ride a high-speed express train, Four then tells the gift receivers to wait on a bench. After the buyers have done their "buying", they go back to Four. Four welcomes back the buyers and then gets mad at X for showing off their satisfaction detector. After counting the ratings, Four announces that Have Cots' satisfaction rating adds up to 11 points, and the Have Nots' satisfaction rating adds up to 10, and are still waiting on their final gift for Woody. Woody hated his gift and gave a 0/10. Four ends the contest announcing that the Have Cots have won.
In "Who Stole Donut's Diary?", Four assigns the Have Nots to protect Donut's Diary so it doesn't get stolen or disappear. When Four came back, Donut's Diary has been is missing. Four and X break up Flower's pot to use as cake for Cake at Stake with the Have Nots, in which Four sings the elimination song, goes to the BRB, and then sends Taco to the BRB. Four then lowers X's garden to a courtroom. Four announces that the challenge is the court case to find who stole the diary, where Four is the judge, the Have Cots are the jury, and the Have Nots are the defendants. Four is interrogated by Bubble and gets angry when she doubts his story and pops her. Four translates Woody's statements into English. Four gets mad at Lolipop and Gelatin for doing the newbie alliance handshake in a courtroom, and tells Leafy to continue. Leafy calls Four "Fourner", which doesn't get a reaction out of Four at first. After Firey is done with his story, Leafy requests Four to let her talk to Firey in private. Four accepts the request, in the condition that Leafy calls him "Fourner" again. In the middle of the court case, a Grape shows up and tells their story, before the Grape could finish, Four unmasks Blocky in a grape costume. X tells Four that he found out who stole the diary, Four then scans X mind.
Four exclaims that the contest has to end before the true owner of the courtroom finds out they're there. The Have Cots settle on Leafy and Four tells them that's wrong, which means they lose. X takes Donut's Diary and gives it back to Four. Four rips up the diary and distributes it to the Have Nots. In the stinger, Four punishes Firey for stealing Donut's Diary by commanding Firey to clean the whole railway of the high-speed express train.
In "Fashion For Your Face!", Four appears in this episode in a jail. He claims that he has been jailed for trespassing into a courtroom that he didn't own. Four announces that the contest is getting him out of jail. In the middle of the contest, the Have Cots are eaten by Purple Face. Teardrop makes a plan, and kills Gelatin because he screams the loudest. Four hears Gelatin being dissolved to death and recovers him inside of the jail. Gelatin opens the bars, which are made using cardboard tubes and covered with metal paint. Four is grateful to Gelatin for freeing him and flies off, ending the contest with the Have Cots winning, and the Have Nots losing.
In "The Game Has Changed", Four is gone for the first bit of the episode due to still flying. When he comes back, he asks Gelatin where everyone is. When TD throws Gelatin into the bush and the Have Nots are exposed, Four asks why they were hiding from him. Blocky tells Four about Purple Face doing Cake at Stake, which makes Four really mad at Purple Face. He beams Blocky up to the BRB and "despawns" Purple Face offscreen. Purple Face is then recovered and Four starts to announce the merge before X interrupts and does it for him, making Four mad again. Purple Face mocks Four and is "despawned" again. Afterwards, Four makes the challenge to throw him a party. Four is agitated every time a contestant makes a party that is not about him. Lollipop's party was the best, so Four gives her permission to choose a contestant to win immunity. After Lollipop chooses Gelatin, Four says who's up for elimination.
In "The Tweested Temple", Four announces Cake at Stake, only to get slapped by Gelatin, telling him it's supposed to be "Brake at Flake". Four then questions if he just got slapped by Gelatin's arm while at the same time insulting it. During Cake at Stake, Four uses the Ferris wheel stand dispenser to drop either water or lava on the safe contestants. For the challenge, Four is told by a whisper (X), that there are 6 totems in the temple, 2 are harmless, but 4 are cursed. Four briefly despawns X for saying 4 is cursed, and announces that the contest is to bring back a harmless totem. Gelatin arrives back with a cursed totem filled with vomit so Four puts him up for elimination. Woody and Leafy are kicked out of the temple with Purple Face totems, so Four puts them both up for elimination. Lollipop and Teardrop come out next, Teardrop with the blessed totem, and Lollipop with the cursed. Flower is the last one to come out and she brings back a rock. Four angrily points out that there are a bunch of the same rocks surrounding the temple and questions why she took 73 days to come out. But because the rock technically isn't cursed, he allows her to have immunity.
In "The Hidden Contestant", Four is first seen asking Lollipop what she thinks of his scribble. She says it looks bad so Four wipes it off his face. Four hosts the Cake at Stake using Carrot Cakes that come to life when thrown at a cursed contestant. After eliminating Woody, Four announces that they're down to the final 5, when Profily suddenly appears, claiming it's the final 6. They claim they are contestant in the game. Four does not believe them and neither do the rest of the final 5. Profily attempts to convince everyone that they were there all along by showing flashbacks of past episodes where Profily was present. Four asks why he doesn't remember them, and Profily refers to as their old chum and claims they're in the intro.
Four eventually lets them on the show, bringing them back to the final 6. However, when Four tries to announce the next challenge, Profily interrupts him twice, making Four want to immediately find a way to get rid of them. After discussing with X, Four makes up challenges to make Profily lose, but Profily does them with ease, angering him. Four decides to eliminate Profily due to being annoying, placing them 6th. The final 5 object to this and Leafy suggests that they throw Profily a party. This angers Four as they have never gone out of their way to do anything for him, but are willing to throw a party for someone they just meant. As a result, Four makes the challenge to eliminate Profily by bringing them to the BRB. During the challenge, Four kicks Flower and Lollipop to the sun when Flower asks him to. At the end of the challenge, Four announces that Leafy is safe while the rest are up for elimination. In the stinger ending, Four is approached by Rusty Coin, Steamy, and Clip, who all want to join the game, but Four finds them too weird. Flower points out to Four that there are too many characters interrupting the game in The Pillary Ruins. Four agrees and decides to drive everyone off to a new location in a bus.
- "Four Goes Too Far": Is multiplied by zero, thus getting turned into liquid and getting inside Donut.
- "If Among Us Was a BFDI Challenge": Is sucked into Black Hole, along with X and the remaining BFB contestants (except for Pencil and Gelatin).
Total kills: 15
|Character||Number of times killed|
- "X Finds Out His Value": Causes an Eight to lose its face and limbs when applying it to a math problem and later removing it when Three was subtracted from it. (debatable)
- "Blocky Prank Compilation - Battle for Dream Island": Recovers Ruby into a gem grinder four times.
- "Eraser swings. Eraser MISSES!": Zaps Naily for piercing his jar of jam. (debatable)
Total screeches: 16
|Character||Number of times screeched||Episodes|
|Donut||2 (1 indirect)||"Getting Teardrop to Talk", "Questions Answered"|
|Taco||1||"Getting Teardrop to Talk"|
|X||3||"Getting Teardrop to Talk" (twice), "Today's Very Special Episode"|
|Tree||3||"Getting Teardrop to Talk", "Fortunate Ben", "Return of the Rocket Ship"|
|Clock||3 (1 partially)||"Getting Teardrop to Talk", "Lick Your Way to Freedom", "Enter the Exit"|
|Lollipop||3||"Getting Teardrop to Talk", "Fortunate Ben", "Take the Tower"|
|Woody||1||"Why Would You Do This on a Swingset"|
|Bracelety||1||"Today's Very Special Episode"|
|Match||1||"Thanks for 4 years of Thanks for 4 years!"|
|Pen||2||"Fortunate Ben", "Return of the Rocket Ship"|
|Yellow Face||1||"Four Goes Too Far"|
|Saw||1 (indirectly, no effect)||"Questions Answered"|
|8-Ball||1||"Enter the Exit"|
|Pillow||2 (eaten)||"Return of the Rocket Ship" , "Getting Teardrop to Talk"|
|Pie||1||"Return of the Rocket Ship"|
|Remote||1||"Return of the Rocket Ship"|
|Bottle||1||"Return of the Rocket Ship"|
|Black Hole||1||"Return of the Rocket Ship"|
- Running gag: Four changes his expression to a face with angry eyebrows and a wide smile, while staring at the screen.
- His favorite holiday is Halloween, as stated in "The Game Has Changed".
- Originally, he was planned to be a giant spider.Template:Cite
- He has the ability to translate Woody, as shown in "Who Stole Donut's Diary?" and "The Game Has Changed".
- He appears in the HTwins.net game Tidepool, as a level 23 creature in the "Classic" character set.
- Cary described Four as a "weird alien creature who doesn't know how to communicate" in his reaction video. If he is an alien, this could explain his strange powers, general behavioral quirks, different eye and limb assets, and his screeching.
- Another implication that he is an alien was shown in "Enter the Exit", in which he says "We don't have that [gender] where I'm from",Template:Ep indicating that he's from another planet or universe.
- Four seems to be omnipotent. However, being omnipotent doesn't grant him the ability to give good solutions to the problems which he is faced with all of the time.
- In the first three episodes, Four starts the intro by raising his right arm in a fist, then the contestants assume the pose when the intro starts.
- Four can talk with his eyes, as shown in "Why Would You Do This on a Swingset".
- Four seems to hate the closed-form of four. (4)
- This is implied in "Today's Very Special Episode" when he, X, and the recommended characters deem Death P.A.C.T.'s makeover to be the worst one, while he ranks
's as the second-best makeover.
- If Four were to be multiplied by zero, or anything that resembles a zero (like Donut), he would teleport into the zero he was multiplied by.
- This was foreshadowed after Donut was multiplied by Four, he states that he had obtained the "factor of Four" within him, granting him some of the powers Four has. Also, when Four was recovered by Pin and Firey, they had to extract Four from the inside of Donut using a syringe before squeezing him into a four shape.
- When Four screeched at Tree in "Fortunate Ben", the screech was the original audio clip in reverse.
- Despite being absent in "The Liar Ball You Don't Want", "Questions Answered", and "This Episode Is About Basketball" until his recovery, Four's likeness still makes indirect appearances in each episode. Respectively, in a cameo in a made up scenario from Blocky, his screeching that was recorded by Donut, and in a flashback.
- Four tends to misname "A Better Name Than That" as "Another Name Than That", as heard in "Today's Very Special Episode", "Get to the Top in 500 Steps", and "What Do You Think of Roleplay?".
- Four seems to have no gender along with X (despite them using he/him pronouns) because they don't have genders in the world they came from.
- This may imply that the other characters from XFOHV have no genders either.
- Fittingly, Four's voice is four semitones higher than the original voice clip of their voice.
- His color and shape are similar to that of the character of the same name from the show Numberjacks.
- On TikTok, jacknjellify said that Four screeches when experiencing intense emotion.
- In "BFDIA 1 Re-Animated By 95 People! - (Fan-Made)", Dora's favorite screen of the number four was restylized to look like Four.
- "The Hidden Contestant" shows that Four can recover other dead Math Symbols from his hand.
- In "Uprooting Everything", Four says that he inherited BFDI, meaning he may have connections with Announcer.
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