Bill Cipher

"Remember! Reality is an illusion, the universe is a hologram, buy gold, BYE!"

- Bill Cipher's famous quote.Bill.oga

Bill Cipher is the main antagonist of the Disney XD series Gravity Falls. He is an immensely powerful dream demon from the Second Dimension who means to bring about the end of the world by opening a rift between his Nightmare Realm and the real world. He also has mysterious motives and a vendetta against the Pines Family, specifically Stanford Pines.

He has been running amok in Gravity Falls, Oregon since being summoned by Stanford over 30 years ago. Bill is also known for his mysterious demeanor, sadistic humor, and desire for total chaos.

He was voiced by the series's creator Alex Hirsch, who also voiced Grunkle Stan, Soos, Old Man McGucket, Jeff and Dippy Fresh.

Appearance
Bill is a floating yellow triangle with a single cartoon eye in the center (though sometimes near the upper corner; also known as the Eye of Providence), a black bow tie and a top hat, and thin black limbs. He is sometimes seen holding a yellow or black cane as well. Bill's body also flashes when he speaks, as he has no mouth.

However, when angered, his color is inverted, with his eye turning black, outline turning white and yellow turning a glowing red, although his form can change to that which is desired at will. A tapestry hanging from the wall in "Northwest Mansion Mystery" depicts him as black or ash gray instead of yellow and with a red eye. In "The Last Mabelcorn", he appears for a few moments as black with a yellow eye.

In the three-part series finale "Weirdmageddon", Bill assumes multiple three-dimensional forms, including a black multi-tiered and multi-armed pyramid, a three-dimensional version of his default yellow form (including a giant version), and his most horrifying and terrible form of all, that of a colossal red multi-tiered pyramid with eight different glowing limbs resembling a spider, sharp teeth and tongues erupting from his body, and a black eye with a lizard-like yellow pupil, which he assumes during the final battle as he hunts down Dipper and Mabel Pines.

As he is being erased and speaking his hidden resurrection spell, he transforms into several different forms in an attempt to escape, including his angry red form, a stone-like form with two stone pyramids which could rotate with one eye on each side that also rotate and a stone block having his arms and bow tie, a distorted form with several green eyes and limbs, flashing between yellow, pink, blue, and orange, before finally assuming his black form with a red eye as seen on the tapestry. When Stanley punches him, he briefly flashes back to his default yellow form before being wiped out completely.

While possessing a person, that person's body will take on a pale tone to their skin, and their eyes will appear yellow with black slits, similar to his own.

If necessary, both Bill's yellow main portion and eye can portray images similarly to a television screen, all of which are seemingly what he is thinking about at the time.

Personality
"To Bill, it's just a game, but to us, it would mean the end of our world."

- Ford describing Bill's view on destroying the World.

At first, Bill seems to be a charming figure, but this easily changes within minutes of his debut, especially when he reveals his true nature: that of a highly intelligent and manipulative psychopath.

He usually speaks with a high-pitched voice with a synthesized effect, but when furious or expressive, it becomes deep and inarticulate similar to traditional demon depictions.

Bill seems to display symptoms of antisocial personality disorder. Symptoms include lying, feeling no remorse, and showing hostility and sadism. A bit of a running gag is whenever somebody calls him insane, Bill will proudly agree with them.

He is also very masochistic, as he enjoys hurting himself, as he tortures Dipper's body while possessing it, and has no problem killing or hurting children like Dipper and Mabel. An expert manipulator and a masterful liar, he is clearly capable of fooling others into trusting him long enough for him to betray them in a heartbeat, and is falsely affable enough to influence others into playing pawns or making deals with him (which he will almost always double-cross to his advantage).

However, while an easily angered madman, he is also highly authoritative, perspicacious, influential and decisive, knowing when to pull out of a fight. As of "The Last Mabelcorn", Bill is shown to be far more than simply a sadistic psychopath; he is an extremely calculating and diabolical mastermind.

Bill is also known for his complete disregard of rules and morals, as he considers laws and physics to be quite senseless and he doesn't even care about the consequences of his actions that can endanger the fabric of existence, as he considers the idea of destroying the Earth as a mere game to him. He dedicated his own existence of spreading complete chaos and his selfish philosophy of doing whatever he wants without care for consequences.

However, in his final moments, Bill is shown to be absolutely terrified of dying as seen when being exploited by his own weakness.

Powers and Abilities
While Bill is vastly powerful and competent, he cannot normally interact with the physical world while trapped inside the Nightmare Realm. He is able to observe the world, but not influence it, as he can only appear to people in dreams, being virtually omnipotent within the dreamscape. Bill can also act by making a pact with a willing vessel, but in doing this he is subject to all the constraints of the vessel body and cannot use his own power to reshape the world at will.

When Bill Cipher escapes the Nightmare Realm, he becomes able to use his full power within the real world, and his power seems to be almost limitless, possibly next to godlike. He is able to reshape reality and everything in it to his will and can even defeat similarly powerful entities such as Time Baby.

On the brink of defeat, he offered Stanley Pines "his own galaxy", implying that his power could potentially be on a cosmic scale. However, he has some weaknesses. Namely, he cannot escape the weirdness-attracting bubble around Gravity Falls on his own and lack the knowledge how to undo the bubble, and he is unable to use his powers directly on objects that are protected by a barrier of unicorn hair.

Also, he cannot possess someone as long as the host refuses to shake his hand. In the mindscape, Bill is nothing less a thought which means if Bill was in someone's mind that is about to be erased, he will be erased along with it, presumably this will annihilate him from existence but there is evidence that he may survive even this, though greatly weakened and possibly unable to return to the physical world.

Quotes
"Oh, oh, Gravity Falls, it is good to be back! Name's Bill Cipher, and I take it you're some kind of living ventriloquist dummy? [laughs] Just kidding, I know who you are, Gideon! (Gideon: W-what are you? H-how do you know my name?) Oh, I know lots of things! (*voice changes*) Lots of things..."

- Bill Cipher after he is summoned.

"Ah, Stan's family, we meet at last. Question Mark, Shooting Star, Pine Tree, I had a hunch I might bump into you!"

- Bill Cipher meets Dipper, Mabel and Soos.

"You're out of your league, kids. Turn around now before you see something you might regret."

- Bill Cipher.

"Boy, you kids sure are gullible! I knew you'd lead me straight to the code! It's funny how dumb you are!"

- Bill Cipher.

"YOU! You can't even imagine what you just cost me! Do you have any idea what I'm like (voices changes to a low, demonic tone) WHEN I'M MAD??!!"

- Bill Cipher's villainous breakdown.

"I'm been impressed with you guys. You're more clever than you look. Especially the fat one. (Soos: (to Mabel) He's talking about you.) So I'm gonna let you kids off the hook. You might come in handy later. BUT KNOW THIS: A darkness approaches. A day will come in the future where everything you care about will change...until then I'll be watching you! I'll be watching you..."

- Bill Cipher foreshadowing Weirdmageddon.

"Well well well! You're awfully persistent, Pine Tree! Hats off to you!"

- Bill Cipher to Dipper.

"Did you miss me? Admit it, you missed me!"

- Bill Cipher.

"It was just a job, kid! No hard feelings! I've been keeping an (becomes bigger and voice becomes lower:) EYE ON YOU (normal size and voice:) since then, and I must say I'm impressed!"

- Bill, feigning admiration for Dipper.

"You deserve a prize! Here, have a head that's always screaming!"

- Bill, giving Dipper a screaming head.

"Hahaha... The point is, I like you. How's about you let me give you a hint, huh? I only ask for a small - FAVOR - in return."

- Bill, offering Dipper a hint to the laptop's password in exchange for a favor.

"Right, you "defeated me". Well if you ever change your mind I'll be here for you, ready to make a deal. Hey, wanna hear my impression of you in about three seconds? AAAAAAAAAAAAAH!!"

- Bill, before leaving Dipper.

"Well, well, well. Someone's looking desperate."

- Bill, after Dipper exceeds the password attempts on the laptop.

"I can help you, kid. You just need to hear out my demands."

- Bill, offering his help to Dipper once again.

"(Dipper: Uh, what crazy thing do you want anyway? To eat my soul? To rip out my teeth? Are you gonna replace my eyes with baby heads or something?) Yeesh, kid, relax. All I want is a puppet! (Dipper: A puppet? What are you playing at?) Everyone loves puppets. And it looks to me that you've got a surplus."

- Bill, telling Dipper all he wants is a puppet.

"Seems to me one little puppet is a small price to pay to learn all the secrets of the universe. Besides, what's your sister done for you, lately? How many times have you sacrificed for her, huh? And when has she ever returned the favor? Tick tock, kid."

- Bill, manipulating Dipper.

"(Dipper: So which puppet are you going to pick?) Hmm, let's see... eenie... meanie.. miney... YOU!"

- Bill Cipher takes Dipper's body.

"Sorry, kid but you're MY puppet, now! AAHAHAHAAHAHAHA!"

- Bill, after taking over Dipper's body.

"Man, it has been so long since I've inhabited a body. (slaps himself in the face) Woo! (slaps the other cheek) Woo! Haha! Pain is hilarious!! And two eyes? This thing's deluxe!"

- Bill, harming Dipper's body.

"Look kid, you've been getting way too close to figuring out some major answers. I've got big plans comin' and I don't need you getting in my way. Destroying that laptop was a cinch. Now I just need to destroy your journal. Race ya to the bottom of the stairs!"

- Bill telling Dipper he plans to destroy his journal to keep him from messing with his plans.

"Heh! welcome to the mindscape, kid! Without a vessel to possess, you're basically a ghost!"

- Bill Cipher telling Dipper that he is now basically a ghost right now.

"(Dipper: I'm gonna stop you!) But how can you stop me... if you don't exist? AHAHAHAHAHAHA!!!"

- Bill Cipher to Dipper.

"Aw, nothing like the theater, huh toots? Hey Soos, wanna hear the exact time and date of your death?"

- Bill (in Dipper's body) to Wendy and Soos.

"Shh! You wouldn't want to ruin the show... Whoops! It's slipping! How's about you hand that book over? (Mabel: No way! This is Dipper's! I'd never give it away!) Hmm, you didn't seem to have a problem taking it for your own play, ditching him when he needed you. So come to your senses. Give me the book or your play is ruined. (Mabel sighs and begins to hand over the journal.) There it is. I mean, who would sacrifice everything they've worked for just for their dumb sibling? (Mabel: Dipper would.) Huh?"

- Bill, trying to get Mabel to hand over Dipper journal and almost succeeds, until Mabel remembers everything Dipper has done for her.

"You can't stop me! I'm a being of pure energy with no weakness!"

- Bill to Mabel.

"Ah! What is this feeling? (Wheezing) My body is burning! I can't move these stupid noodle legs! Curse you, useless flesh sticks! Body...shutting down... must...scratch... mosquito bites... Whoa, whoa, whoa, whoa whoa.. hey!"

- Bill, getting tried out due to Dipper's body suffering from fatigue, and then gets flung out of his body altogether.

"This isn't the last you'll hear of me! Big things are coming! You can't stop me!"

- Bill's last lines in "Sock Opera".

"Well, well, well, well, well, well, well, well, well, well, well! Aren't you a sight for sore eye! Stanford Filbrick Pines, my old pal!"

- Bill to Ford.

"Oh, quit playing dumb, IQ! You knew I'd be back! You think shutting down that portal could stop what I have planned? I've been making deals, chatting with old friends, preparing for the big day! You can't keep that rift safe forever. You'll slip up, and when you do...!"

- Bill telling Ford he will get his hands on the rift. "(Ford: Get out of here! You have no dominion in our world!) Maybe not right now, but things change, Stanford Pines! Things... change."

- Bill to Ford.

"Hiya, smart guy! Woah, don't have a heart attack, you're not 92 yet."

- Bill's first words to Ford.

"Name's Bill! And your name's Stanford Pines, the man who changed the world, but I'm getting ahead of ourselves; let's relax! Care for a game of interdimensional chess? Have a cup of tea."

- Bill, pretending to be friendly to Ford.

"(Ford: Bill! You lied to me! Where does that portal really lead?) Ho ho-looks like Mr. Brainiac finally got smart! Let's just say that when that portal finishes charging up, your dimension is gonna learn how to PARTY! Right, guys?!"

- Bill revealing his true colors to Ford. "A deal's a deal, Sixer! You can't stop a bridge between our worlds from coming, but it would be fun to watch you try! Cute even!"

- Bill to Ford.

"I guess I can't possess anyone inside the shack, so I'll just have to find my next pawn on the (Voice gets lower:) OUTSIDE."

- Bill, deciding to possess someone outside the shack.

"At last! At long, long last! The gate between worlds has opened! The event 1 billion years prophesied has come to pass! The day has come! THE WORLD IS FINALLY MINE!"

- Bill Cipher.

"Oh, it's happening. It's finally happening! Physical form? Don't mind if I DO!"

- Bill, upon gaining physical form.

"Alright, listen up, you one-lifespan, three-dimensional, five-sense skin puppets! For 1 trillion years I've been trapped in my own decaying dimension, waiting for a new universe to call my own. Name's Bill! But you can call me your new lord and master for all of eternity!"

- Bill Cipher to Gravity Falls as Weirdmageddon begins.

"Now meet the gang of interdimensional criminals and nightmares I call my friends. 8 Ball! Kryptos! The being whose name must never be said! Haha, what the heck. It's Zanthar. Then of course there's also Teeth, Keyhole, Hectorgon, Amorphous Shape, Pyronica, Paci-Fire, and these guys. This is our town now, boys!"

- Bill, introducing his minions.

"It's time we do a little redecorating. I could really use a castle of some kind! (Bill's castle rises) And how about some bubbles of PURE MADNESS?!? This party never stops! Time is dead and meaning has no meaning! Existence is upside down and I reign supreme! WELCOME, ONE AND ALL, TO WEIRDMAGEDDON!"

- Bill Cipher brings forth Weirdmageddon.

"Well, well, well, and here I thought today couldn't get any BETTER."

- Bill, upon noticing Ford.

"Good old six-fingers. I've been waiting an (Deep voice:) ETERNITY (Normal voice:) to have a chat face to face."

- Bill to Ford upon capturing him.

"Everyone, this Armageddon wouldn't be possible without help from our friend here. Give him a six-fingered hand!"

- Bill telling him minions Ford is to thank for Weirdmageddon.

"This brainiac is the one who built the portal in the first place! Now don't look so sour, Fordsy. It's not too late to join me. With that extra finger, you'd fit right in with my freaks."

- Bill mocking Ford and offering him a place among his minions.

"Now isn't. This. (With a deep voice along with his normal voice:) INTERESTING? (Normal voice:) My old puppet is back for an encore."

- Bill, after Dipper stands up to him.

"You think you can stop me? Go ahead, Pine Tree, show me what you've got. (Dipper: I...uh... I... uh...) I UM I. Do it, kid. Do some brilliant thing that takes me down right now. Whaddya got, Pine Tree, everyone's waiting. DO IT. (Dipper: Augh, BILL! (His fist hits a force field in front of Bill's eye and he is thrown backward into a tree; he rubs his head) Ugh...) That's right. Don't be a hero, kid. (Waves Ford) This is what happens to heroes in my world. (Burns the Journals) (Dipper: NO!! THE JOURNALS!!) Not much of a threat now, are you?"

- Bill, goading Dipper into attacking him, then burning then journals after Dipper's attack fails.

"Now can anyone remind me why we came here? (8 Ball: To get WEIRD!) THAT'S RIGHT! VIP party at the Fearamid. Oh, and 8 Ball, Teeth, you've earned a treat, have the kid for a snack."

- Bill telling his minions they are going to party at the Fearamid, and telling 8 Ball and Teeth to eat Dipper.

"Hahahaha! Go nuts, guys! When we're done partying, I unveil Phase 2."

- Bill, during his VIP party.

"(Lolph: Open up! This is the police. Time Police.) Just play it cool, ditch the time-punch. Let me do the talking."

- Bill upon hearing the time police at the door.

"(Time Baby: Hear this, Cipher!) Ugh, Time Baby. (Time Baby: If your rip in this dimension continues, it could destroy the very fabric of existence! Surrender now, or face my tantrum!) Oh, no, a tantrum! Whatever will a do about that HOW 'BOUT THIS?? BOOM."

- Bill, killing Time Baby.

"Ladies, gentlemen, that creature with like 87 different faces. (Creature with 88 different faces: 88 different faces!) Whoa-ho, sorry - touchy subject. Anyways, it's been fun turning Gravity Falls inside out, rounding up all its terrified citizens and then stacking them into this massive throne of frozen human agony. Don't worry, they're not conscious anymore. Probably. (Lazy Susan: Uh, my omelettes. They-they have friendly faces.) Whoops. Hehe, back, back you go there. But Gravity Falls is just the beginning. It's time to take our chaos worldwide! Alright boys, to the corners of the Earth. Set the world aflame with your weirdness. This dimension is ours! Ah, global domination. I could get used to - (the demons hit an invisible shield and fall down) WHAT??!!! Hmm, this might be more complicated than I thought. (Paci-Fire: I think I broke something.) Walk it off!"

- Bill, ordering his minions to spreed their weirdness worldwide, only to discover there is a barrier keeping all of them, including himself inside Gravity Falls.

"Alright, can anyone explain to me why, even with our newfound INFINITE POWER, none of us can escape the borders of this STUPID HICK TOWN!!!! There's some kind of force field keeping us in, but who would know how to fix it? Hmm. Maybe someone needs to come out of retirement."

- Bill angry at not being able to leave Gravity Fall, but after composing himself he realizes that Ford might know how to disable the barrier.

"(Keyhole: Bill! Uh, sorry, Boss, but Gideon let the Pines family escape! They're inside Mabel's bubble as we speak!) Buddy, Mabel's bubble is the most diabolical trap I've ever created. It would take a will of titanium not to give into its temptation. Fetch me Gideon and take the rest of the day off. Things just got a little more interesting."

- Keyhole informs Bill the Dipper and his friends are inside Mabel bubble, but Bill says he is not worried due to how powerful a trap the bubble is.

"We'll meet again. Don't know where. Don't know when. Oh, I know we'll meet again, some sunny day."

- Bill Cipher singing.

"Ah, sharp as ever, Fordsy. As you may have noticed...I've recently had a (Voice echoing:) multi-dimensional makeover. I control space, matter, and now that that dumb baby's out of the way, time itself! But I wasn't always this way. You think those chains are tight? Imagine living in the second dimension, flat minds in a flat world with flat dreams. I liberated my dimension, Stanford, and I'm here to liberate yours. There's just one hitch. As it turns out, my weirdness can't escape the magical confines of this town. There's something keeping me in."

- Bill Cipher, revealing where he came from to Ford while telling for some reason he is stuck in Gravity Falls.

"Listen, Ford, if you just tell me that equation, finally your dimension will be free. Anything will be possible. I'll remake a fun world-- a better world! A party that never ends with a host that never dies! No more restrictions! No more laws! You'd be one of us. All-powerful. Greater than anything you've imagined! And all I need is your help."

- Bill offering Ford Godhood in exchange for the equation to escape Gravity Falls.

"You're making this so much harder than it needs to be. Everyone has a weakness, tough guy! I'll make you talk! It's only a matter of time."

- Bill, telling Ford he will torture him for the equation.

"So the mortals are trying to fight back, huh. Adorable! Henchmaniacs, you know what to do! Take them out!"

- Bill Cipher.

"Guys, seriously? You had, like, one job to do here."

- Bill, after his Henchmaniacs are defeated.

"(Ford: Bravo, Dipper and Mabel!) Well, would you look at that. Those kids really care about you, and you care about them...(*Voice turns deep*) DON'T YOU?! (Ford: What are you.... Oh. Oh no.) Perhaps torturing those kids will make you TALK!!"

- Bill planning to torture both Dipper and Mabel to coerce Ford into helping him.

"Aah! My eye! Do you have any idea how long it takes to regenerate that?!?"

- Bill, after his eye is torn out by the Shacktron.

"What the... Hey, Achilles! Nice work with the HEEL! FORE!"

- Bill, ripping off the Shacktron's leg then hitting it with it.

"Oh no, it's Bill! Right? Isn't that what you're all thinking? Hey, Gideon, why aren't you dancing? Chop chop, huh?"

- Bill, discovering the heroes in his castle.

"Ha ha ha ho! This is just too perfect! Didn't you brainiacs know the zodiac doesn't work if you don't all hold hands? And what's better, you've brought every threat to my power together in one easy-to-destroy CIRCLE!"

- Bill, destroying the Zodiac Circle.

"You guys wanna see what happens to your friends when you can't get along?"

- Bill to Stan and Ford.

"Not so fast. You two wait here! (Turns red and grows six arms) I've got some children I need to make into corpses. (Deep voice:) Seeya real soon."

- Bill, trapping Stan and Ford before transforming into his most powerful form and chasing Dipper and Mabel.

"When I get my hands on you kids, I'm gonna DISASSEMBLE YOUR MOLECULES! You've tricked me for the last time!"

- Bill, while chasing Dipper and Mabel.

"All right, Ford, time's up! I've got the kids. I think I'm gonna kill one of them now just for the HECK of it!! EENIE... MEENIE... MINEEE... YOU!!!!"

- Bill about to kill Dipper and Mabel with a snap of his fingers.

"HAHAHAHA! Oh, even when you're about to die, you Pines twins can't get along."

- Bill mocking Ford and Stan.

"Oh, I'm here. I'm finally here! Look at this place: a perfect, calm, orderly void. Gotta hand it to ya, Ford. You really know how to clear your m-- WHAT?!"

- Bill, after seemingly entering Ford's mind, only to discover he actually entered Stan's instead.

"WHAT?! The deal's off!! What the...No, no, no, no!"

- Bill, trying to call off the deal, only to be trapped in Stan's mind. "Y-you idiot! Don't you realize you're destroying your own mind, too?!"

- Bill, pointing out to Stan the memory gun will erase his mind too.

"Let me outta here! Let me OUT! Why isn't this working?!"

- Bill, trying to escape Stan's crumbling mind.

"(Stan: Hey, look at me. Turn around and look at me, you one-eyed demon! You're a real wise-guy, you know, but you made one fatal mistake: you messed with my family!) You're making a mistake!! I'll give you anything: money, fame, riches, infinite power, your own galaxy, PLEASE! (starts to glitch) NO!! What's HAPPENING TO ME?!!! (reversed) A.X.O.L.O.T.L., MY TIME HAS COME TO BURN, I INVOKE THE ANCIENT POWER THAT I MAY RETURN! (normally) STANLEY!!!!!"

- Bill's last words right before being destroyed by Stanley.

"Note to self: Possessing people is hilarious! To think of all the sensations I've been missing out on- burning, stabbing, drowning. It's like a buffet tray of fun! Once I destroy that journal, I'll enjoy giving this body its grand finale- by throwing it off the water tower! Best of all, people will just think Pine Tree lost his mind, and his mental form will wander in the mindscape forever. Want to join him, Shooting Star?"

- Note left by "Bipper" and discovered by Mabel after the events of "Sock Opera", revealing that Bill planned to kill Dipper if his plan succeeded and make it look like a suicide; as seen in the book Gravity Falls: Journal 3.

Trivia

 * S1e19 this is funny how dumb you are.pngary to popular belief, Bill cannot be identified as male or female, as he is a being above the concept of gender or race. He also claims his home dimension has 14 billion different gender identities and there is paperwork involved in determining sexual orientation and he's not exactly been keeping track of his.
 * Bill Cipher's line, "A.X.O.L.O.T.L., MY TIME HAS COME TO BURN, I INVOKE THE ANCIENT POWER THAT I MAY RETURN!", is reversed. He may have said it that way because he does not want Stanley (or anyone, for that matter) to be aware that he could come back.
 * The AXOLOTL itself appears in a “hidden page” from the book Dipper and Mabel and the Curse of the Time Pirates' Treasure!: Select Your Own Choose-Venture, which can be viewed by decoding a cipher that shows a link to Disney XD’s website, (the link being: www.disneyxd.com/awrongturn) the page is about Dipper and Mabel meeting the Axolotl.
 * His full name is likely a reference to the Beale ciphers; encrypted manuscripts which are said to lead to a great, hidden treasure and which only one of three have been decoded.
 * This is entirely possible as codes and ciphers are hidden all throughout the series.
 * Bill can be summoned if one were to recite an incantation found in Journal 2.
 * He is based on The Eye of Providence, a common symbol allegedly used by the Illuminati (which is theorized to follow the New World Order concept), as creator Alex Hirsch confirmed in the Special "Behind the Pines" stating: "What if I took the triangle off the back of the dollar bill, dress him up in a top hat, and stupid little arms and legs, and named him Bill after the dollar?".
 * However, it is currently unknown why he was based on the Eye of Providence.
 * This is also mentioned in one of the Journals, where someone (presumably Ford) has scribbled a note, saying, "He's in my wallet!", and sketched the seal from a dollar bill.
 * Various things were discovered about Bill Cipher during a Reddit AMA, including the fact of him once having a family, having something to do with Gompers in the past, and his favorite music being 10 hours of Rising Shepard Tone. The AMA also revealed that Bill Cipher thinks in capital letters.
 * His backstory parallels Flatland, a mathematical novella written by Edwin Abbott Abbott about a flat world where the shapes live, and the more sides they have, the higher position they got in their society (thus circles are the highest, and triangles are the lowest). Bill refers to this on his AMA when saying "Edwin Abbott Abbott has a decent idea". It is implied that a similar case happened in his home dimension which would explain his thirst for power, as since he is a triangle, Bill had no power in his world. An evidence of this is when Ford visits a similar dimension called Exwhylia during his interdimensional trip when he disappeared for 30 years, which also has a similar case.
 * It was never made clear what Bill truly is. While he is called a "demon" by other characters, creator Alex Hirsch has confirmed that this is just a name for lack of better description. Ford even states that no one knows really what he is. Because of his reality warping abilities and bizarre nature, it is likely that he is inspired by the Outer Gods of Lovecraftian lore. Judging by his nature, it is also possible that he is based on It from the novel with the same name.
 * A memorial statue of Bill can be seen at one point in the graphic novel Gravity Falls: Lost Legends with the caption "He was the WORST".
 * Bill's top hat is not an accessory or article of clothing; it is actually part of his body. This can be seen in the episode "Weirdmageddon Part 1" when Stanford shoots his quantum destabilizer gun at Bill and misses, hitting his hat and revealing flesh and bones within.
 * Bill originally had a villain song titled "It's Gonna Get Weird", but the song was cut due to time restraints. A demo version sung by Neil Cicierega still exists and was released on his Tumblr.
 * Bill had a cameo in Justin Roiland's animated series Rick and Morty. In the episode "Big Trouble in Little Sanchez", he is briefly seen on a computer monitor. Bill is also seen on a screen when Rick is captured by the Galactic Federation as if he is being studied by both Nuptia 4 and the Galactic Federation in "Rick and Morty."
 * In the Rick and Morty episode "Morty's Mind Blowers", where it's discovered that Rick Sanchez secretly stores Morty's memories, there are two memories labeled "Stanford" and "Bill C". It's very likely that they are memories of encounters with Ford and Bill Cipher, since the two series are considered to occur in the same multiverse, and both Ford and Bill, as well as Morty, have traveled between dimensions.

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