A famous gunslinger with the ability to use the mysterious ARMS weapons. Reborn into the body of a 10-year old, he tries to understand what has happened. He is know as the reincarnation of King of Evil because of the sign of his back since he was born. Since years had passed, Sheyenne ended in a body of a 5-year old kid. So he had to find his true body with Dr. Kiel Arronax, Isaac the Pippepo Poppepi, and other companions.
