Make your own plot! Just... Don't be too freaky
Looks of Bill: Tall, yellow skin, a bob-triangle like hair, wears a suit (like from the 1950's), a hat with the Ankh simbol of immortality from ancient Egypt (☥), and the power symbol/pharaoh symbol (𓋾𓌅) as some kind of earings, had a third eye on his forehead and uhh... . BUT FLAT CHEST.