He is a serious person who can be a bit harsh at times. He just feels like you can only be a good Demon Slayer if you can be to the point and waist no time. He is training to be a Thunder Hashira being trained by the former Thunder Hashira Jigoro Kuwajima. He has cold turquoise eyes framed by thick, arched eyebrows. He has an unfriendly face, that is always set in a semi-permanent snarl. He wields a nichirin sword and uses it along with his thunder breathing to slay demons.