He has an overweight figure, with large hands, thin legs, and a face that comically resembles a hamster. He has short black hair that ends with curled points against his cheeks and forehead and a small pointed ahoge. Hifumi has a verbose manner of speaking, often going on long-winded tangents about his interests such as anime or fanfiction. He also has a tendency to casually make creepy or perverted comments in the middle of conversations, especially about or to women.