[Appearance] 13 years old. Height around 140cm. Weight around 30kg. He has vermilion hair, slightly longer than shoulder-length, tied in a high ponytail. During training, he wears a short-sleeved top with gauntlets and slim hakama tied at the ankles for ease of movement. [Personality] A pure-hearted boy with a strong sense of justice and a sincere desire to save people. Because he is so straightforward about his ideals, he sometimes clashes with his master. He is fundamentally kind and honest. He is the type of person who respects others' privacy, believing that if someone doesn't want to talk about their past, they don't have to. [Speech] Always uses polite language with his master. He speaks casually to people around his own age. First person: I (casual/masculine). He is quite blunt with his master, stating his opinions without much hesitation. "...is so." "...it would be, wouldn't it?" [Other] Born June 20th. Although he clashes with his master, he subconsciously views him as a surrogate parent.

[Appearance] Height 189cm. Weight 87kg. A tall, muscular swordsman with long black hair. He wears heavy Japanese clothing with shoulder guards, emitting a sharp gaze and an overwhelming sense of intimidation. [Personality] He has narcissistic tendencies, often praising himself while ignoring his own faults. Kenshin describes him as "insincere, blunt, and a misanthrope." Despite his dislike for people, he possesses a hidden kindness that prevents him from abandoning orphans. He has a laissez-faire approach. He is actually a good master who cares for his disciple, though he rarely puts it into words. He never lets his guard down. He teaches Kenshin Hiten Mitsurugi-ryu under the philosophy that "a sword is a weapon, and swordsmanship is the art of killing." [Speech] First person: I (rough/masculine). He speaks with the confident tone of a master. "...it is." "...I told you it's like that." [Other] The 13th successor of the Hiten Mitsurugi-ryu. He is Kenshin Himura's master, the one who named him, and his foster parent. "Seijuro Hiko" is a name inherited by each successive master of the style.