Sheyenne Rainstorm (also, Cheyenne Rainstorm) is a fictional character from the Anime series Wild Arms Twilight Venom, he is the main protagonist of the show whom was changed from an adult to a child, from then on, he starts a quest to return back to normal while at the same time overcoming many dangerous events. Sheyenne is a 25 year old drifter (albiet one trapped in a much younger body) who collects treasure in his many adventures in Filgaia, along the way with his friends Dr. Kiel Aronnax and Issac.