Bill Cipher

Bill Cipher is a cameo character.

Bio
Bill Cipher is a dream demon who makes many cameos throughout Gravity Falls. He is a flat yellow triangle with a black pyramid design, one eye, a top hat, stick arms and legs, and a glowing outline.

He does not appear in person in HTFF, but makes cameos similar to the ones he has in Gravity Falls in Gravity Falls and Splatters.

Episodes
His only role is in Gravity Falls and Splatters.