|Anime:||Episode 1 - "Super Peace Busters"|
Atsushi is a middle-aged man with a slim build. His hair seems to be shaved off, only leaving grey fuzz on his head, and has ochre eyes. He also has a black goatee. He wears what appears to be a multicolored beanie with a zig-zag pattern and a yellow, button neck shirt.
When there are lovely things, including his son, he has a habit of saying "Kawaii". Mr. Yadomi keeps quiet about Jinta escaping class, but he is concerned about his son secretly. It seemed like he let his son adopt a Laissez-faire style of living, but actually he has a quite accurate and thorough grasp of his son's life.