Seidan is a custom template champion in League of Legends and one of the Piltover Student. He is half-demon half human. His right hand can overtakes a form of demon at his own will but he cannot fully control to fully takeover as demon it will only happen when in grave danger. Seidan can also cast a dark magics which it is innately learned. Seidan is a genius student, quite, intimidated by others and a cool one. He is also one of the student does not invent or use Hex-weapons. Alpha Powers is demon and dark magics.
He was found in the Shadow Isle when he was an infant and an exorcist found dead beside the infant. A wanderer found him and keep him.