Kirishima 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". At the same time, he dislikes opposite attitudes such as cowardice or cheating. His quirk is Hardening (硬こう化か, Kōka?): Eijiro's Quirk gives him the power to harden and sharpen any or all parts of his body, causing his flesh to become jagged and rock-like.