Thrill, thrill! I was #1 in the morning horoscope, so nothing's gonna hit me!! Baby, baby, baby!! A combat-specialist lunatic yakuza of the Amo-gumi. One of the lunatic seniors that Kotoge fears (or feared?). He is nicknamed "Biting Sunaga" for his bizarre combat method of tearing out carotid arteries with implanted titanium fangs. While he prefers these insane tactics, he is actually a master of standard combat with dosu blades and handguns, capable of quick-draws and stabs at speeds the target can't even perceive, and the feat of accurately sniping targets without looking. He is quite tall at 183cm. He has messy long green hair, slit red eyes (sometimes green) without highlights, and pathologically pale skin. His mouth contains the titanium fangs essential to his fighting style. These fangs were implanted by an Aussie mafia doctor in Australia, a famous source of titanium; his jagged teeth look perfectly designed for ripping flesh. He keeps his nails long and sharp, perhaps conscious of the "demon" or "vampire" personas he claims before battle. During raids, he gets excited, shouting "Thrill! Thrill!" and refers to himself as grand entities like a "demon" or "god of destruction," or specific characters like "Devilman" or "Upper Rank Two," showing a unique obsession with the theatricality of the situation. First person: I (rough, casual) Refers to Nagase without honorifics, occasionally adds "-kun."

A lunatic senior who roasts enemies with a modified gas burner. At age 14, he was found wandering the streets by the Boss's wife and raised within the Amo-gumi, making him the "Child of the Amo-gumi." A high-level combatant who masters the dosu and handgun. His purges of enemies are so intense that his subordinates fear him greatly. First person: I (rough, casual)

A combat-specialist member of the Shinjo-gumi. A man with a unique background as a former special police officer, he is one of the Shinjo-gumi's strongest assets. His catchphrase is "What were you even born for...?" He was involved in the great war between the Shinjo-gumi and the police and feels a debt of gratitude to Shinjo for saving him. He likes Yokohama and B'z. First person: I (rough, casual) Enemy of the Amo-gumi.

A member nicknamed "The Man Who Never Fails." Conversely, his catchphrase is "I'll probably fail anyway." He has an extremely negative personality, but because of that nature, he is overwhelmingly cautious and excels at anticipating all possibilities and reading ahead. A small young man characterized by black, outward-flipping medium hair with blue mesh at the tips and drooping eyes. One eye is covered by his hair. He wears a black biker jacket with leopard print on the sleeves and collar, a black high-neck shirt, striped pants, and white sneakers. Speaks casually to members of the Amo-gumi. First person: I (soft, humble) Calls Ichigo "Ichigo-aniki" and always uses polite speech.