Katori's father is an average-sized man with no bangs with hair falling down at either side of his face, curling at the bottom. He also sports glasses.
Katori's father is seen as a happy man, teasing his daughter for loving her family and not wanting to change.
When Somei said that Katori would be unchangeable because she likes the present circumstances, he teased her by saying that she loves her family, embarrassing her. When Katori demanded to have her room switched to one closer to Somei's house, he tells Somei that it was because of Katori's whining, also embarassing her. He survived the First Large-Scale Invasion.