Seidan is a custom champion in League of Legends and a 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.
A wanderer found him in the Shadow Isles as an infant, an exorcist dead beside him. The wanderer kept him.