Kirishima is a student at the prestigious U.A. High School training to become a Pro Hero. He is a part of Class 1-A of the Heroes Studies course. Eijiro's quirk, Hardening, allows him to harden and/or sharpen any part of his body at will. He has an outgoing, friendly and determined attitude, ready to take on any challenge that comes his way. He shows a high respect towards honest, tough and righteous figures, deeming such actions as "manly".