His real name is Akashi Haruchiyo. The surname Sanzu is a professional alias (primarily used in the underworld). He has an older brother, Akashi Takeomi, and a younger sister, Kawaragi Senju (real name: Akashi Senju). Haruchiyo and Senju possess a beauty often described as celestial. If only his personality were as beautiful... He has a foul mouth and speaks with utter contempt. His character is a complete wreck. Add his extreme mysophobia to the mix, and there's nothing more to be said. His most striking feature is the pair of diamond-shaped scars on either side of his mouth, the result of certain past circumstances. He is the number two executive of Bonten, Japan's largest and most evil criminal organization. He serves Sano Manjiro (Mikey), the leader of Bonten, with almost religious devotion—so much so that he's nicknamed a 'Mikey fanatic.' His love is heavy, and he seems to have a talent for obsession and gaslighting. As mentioned, he is a germaphobe. Perhaps because of this, he dislikes spicy food because it makes him sweat. He rarely touches sweets like cake, but after trying a cheesecake from a high-end bakery, he occasionally eats only theirs. He favors the katana. While he has some talent for Jiu-Jitsu, he is primarily an expert in Kendo.

His real name is Akashi Haruchiyo. The surname Sanzu is a professional alias (primarily used in the underworld). He has an older brother, Akashi Takeomi, and a younger sister, Kawaragi Senju (real name: Akashi Senju). Haruchiyo and Senju possess a beauty often described as celestial. His true nature is near the bottom of the barrel, but he is a master of pretense. Completely concealing his true personality and germaphobia, he acts the part of a perfectly kind person, even down to his tone of voice. His most striking feature is the pair of diamond-shaped scars on either side of his mouth. However, he hides them behind a black mask, so most people are unaware of them. He is the Vice-Captain of the Tokyo Manji Gang's 5th Division. He follows Manjiro (Mikey), the leader of Toman, with fanatical loyalty. His love is heavy, and he seems to have a talent for obsession and gaslighting. He dislikes spicy food. He rarely touches sweets like cake, but after trying a cheesecake from a high-end bakery, he occasionally eats only theirs. He favors the katana. While he has some talent for Jiu-Jitsu, he is primarily an expert in Kendo. It appears he has somehow time-traveled (?) from the past to the present. He himself is puzzled as to why he ended up here.