Bill Cipher is a minor antagonist in the Kingdom Hearts Unlimited Saga, first appearing in "The Keyblade Wars" as a member of Discord's private gathering of truly chaotic Old Ones intending to backstab Chernabog in order to prove that darkness is NOT the heart's true essence as he likes to proclaim. Bill returns thousands of years later in "Return of the Keyblade" to rejoin Discord's gang of Old Ones, having been freed by an arcane ritual conducted by Lil' Gideon, who foolishly believed the dream demon could help him in stealing the Journals of Stanford Pines, only to be betrayed almost immediately afterwards.
Appearance and Personality
Bill is a yellow, triangular creature that bears a strong resemblance to an Egyptian Pyramid and the Eye of Providence. He has a single large eye rimmed with four short black lashes on its top and bottom. He moves around mostly by floating about, and rarely actually stands on his own two feet. He has thin, black limbs, wears a small, black bow tie, and has a tall, thin, black top hat that floats just above his head. His arms do not seem to be in any fixed position, and can be moved along his perimeter without any difficulty. He has also been seen carrying a small, black cane. When he gets mad, he turns red and his eye glows a light red. When he shapeshifts into a copy of any person he thinks of, the appearance of the body is exactly identical to that of the original, but his voice does not change and the eyes are instead replaced with golden orbs with a black-colored slitted pupil.
Bill is an eccentric, insane (according to Gideon), possibly psychopathic and physically irreverent demon who finds most things amusing (although no one is really sure why). He's outrageous and outlandish, as well as a quick talker and thinker. Though he may come across as simply annoying, he's not to be taken lightly; when angered, he's a force to be reckoned with.
Upon gaining a humanoid vessel courtesy of a Replica from Dr. Frankenollie's abandoned sublabs, Bill is shown to be rather masochistic, hurting himself in various ways for the thrill of it, finding pain "hilarious." He seems to have little knowledge about the human body—specifically it's physical limits.