He appears to be around the thirties. He has dirty blond hair and eyebrows. He often wears a tracksuit in the Aobajousai colors (aqua and white).
He takes the matches and practices very seriously and is often seen yelling at the players, even over little things.
Karasuno High Team Formation ArcEdit
Spring High Preliminary ArcEdit
Mizoguchi seems to have a habit of picking on Kunimi the most out of all the other members of Aobajousai's Volleyball Club. He would yell at the player for being too slow, not receiving the ball properly, or for skipping his decoy practice.
- Current Concern: Sometimes he'll catch himself saying "Kids these days..." and it's like he can feel his own descent into middle age.