Oota is a tall person with long, light brown hair kept in a neat ponytail at the back of his head. He has two pieces of hair that are left out of his ponytail, each brushed to different sides of his face. His iris colour is undeterminable. Multiple characters have noted him to look intimidating and mature for his age. He is strong, as evidenced by his ability to carry Tanaka around their school without any issue and to do other difficult tasks.