Ryuuji is a young man of average height with short, blue hair, and due to heredity, his sanpaku eyes make him look like an intimidating delinquent and causes many misunderstandings because people find him scary. He is usually seen wearing the school uniform. Ryuuji often helps Taiga Aisaka with domestic chores which she is otherwise unable to perform. At school, he is known as "the only person able to stop the palmtop tiger", referring to Taiga's nickname. Due to misunderstandings.