Sei is a Waru male. He doesn't care that much his younger brother, Kiyoto. He is similar to an assassin. He always has a blank face, but he has one because he is focusing and staying on guard. Sei is the embodiment of “leader”. He's 27 years old. Sei can manipulate gravity and use portals. He can summon his sword that can create slashes of infused gravity. Sei is Rank 1 of all 9 of his siblings, also being the oldest out of them