Umeji wears the default school uniform with the jacket open, revealing a dark yellow shirt with a flaming skull on it. He wears a weapon bag on his back containing a baseball bat in it. He also wears multiple ear piercings on his left ear, consisting of a lobe piercing and three helix-shaped piercings respectively. He has spiky, blond hair and orange eyes that fade into yellow which is then framed by thin, arched eyebrows. He has a large scar running down the middle of his right eye.