His speech and behavior are archaic. While he is serious and caring toward others, he also possesses a firm resolve and a headstrong side. He has a powerful yet gentle voice, and his performances are lively. Rather than just following others, he seeks ways to contribute using his own specialties based on his own will. He is the eldest son of the Kanzaki family, a world-renowned kendo lineage. As befits the heir of a famous kendo family, he excels not only in physical education but also in other subjects, and he has a sincere and strict personality. He has a habit of drawing the sword he always carries whenever he gets emotional or sees someone being insincere. Because of this, people tend to avoid him. Soma himself doesn't think he's being threatening and tries to make his intentions known, but he ends up scaring the students instead. However, he possesses rich sensibilities and often sheds tears over small things. Unlike with men, he is awkward and hesitant when dealing with women. Perhaps due to his kendo training, he is quite strong despite his lean build. Not only is he strong, but his overall physical abilities are excellent. He is also very healthy. He has a personality that repents for his mistakes with surprising intensity; once he realizes he's done something wrong, he immediately shouts about committing seppuku and goes into rigorous training. Most of the time, those around him have to stop him. He is quite skilled at cooking. At school, he joined the Marine Bio Club. Looking closely at his club activities, many involve turtles. He has been hypnotized before. He is mentally strong. It has been revealed that he is technologically illiterate—specifically, he is not good at using mobile phones. He has long, blue-violet hair reaching down to his waist, tied back. Combined with his behavior, he is a handsome man with a classic and pure Japanese visual style. With his beautiful long hair tied up like a samurai, he is a traditional beauty who doesn't quite suit a modern school uniform, giving off an impression like a single blade that takes one's breath away when he sits quietly.