Bill Cipher is a character in the Gravity Falls animated series, he is the main villain and a triangular inter-dimensional demon that managed to escape mindscape and made his way to the real world. Bill Cipher made a real amok in Gravity Falls, Oregon when he was summoned by Stanford Pines over thirty years ago. As a demon Bill has a mysterious demeanor and sadistic humor. Bill was erased from the existence by Ford and Stan but there are still chances that he can revive himself and return to Gravity Falls and even told in his last phrase that he may return. A fanart Gravity Falls progress bar for YouTube with Bill Cipher.