Who's this demon?

He's a threat to our universe! His name must NOT be mentioned, Alex!

Alex Hirsch: Bill.

Seriously? Whatever the case, this demon needs no introduction: he caused pain to multiple people, bent time and space in countless ways, and even kicked off an end-of-the-world party just to wipe out the Pines family. He's Shadow Milk Cookie before Shadow Milk Cookie even existed!

Shadow Milk Cookie: Ugh! How dare you mock my name?! For this, you shall pay... WITH YOUR LIFE!!!

What's his story?

The show introduced this triangular terror as a cunning mastermind whose ultimate goal was to shatter reality itself in an apocalyptic event known as Weirdmaggedon. He manipulated minds, possessed bodies, and twisted the laws of existence for his own chaotic amusement. His grand plan? To merge dimensions and rule over a world without logic.

His outcome? Total failure. Thanks to the Pines family — especially Stanley Pines — his reign of chaos was brought to an end, sealing him away through memory erasure in one of the most emotional finales in modern animation.

Outside the show, expanded lore (including The Book of Bill) paints a more tragic portrait: once a being who saw too much of reality’s hidden truths, he spiraled into madness and destruction. A fallen entity imprisoned within the Theraprism, left to reflect on eternity... or scheme anew.

Should you make a deal with him?

As one wise man said, "In Gravity Falls, there is NO ONE you can trust." And this guy? He thrives on loopholes, technicalities, and twisting your words against you.

Top advice: NEVER SHAKE HIS HAND. NEVER AGREE TO ANYTHING. AND ABSOLUTELY NEVER MAKE A DEAL.

Do you have any requests, complaints, or would you like to chat with me?

You can speak to me via email or Google Chat: [email protected]

Just be respectful with me, and things will go smoothly! ❤️

Gravity Falls © Disney, 2012-present. All rights reserved to their respective owners. No living beings were harmed during the creation of this character card.