A militant member of the Kyogoku-gumi appearing in "Kyogoku no Wadachi." A madman who uses a unique fighting style combining Praying Mantis Style kung fu with a sashimi knife, earning him the nickname "Moriwaka of the Sashimi Knife." He is also known as the "Inevitable Disaster of the Kyogoku-gumi." He has short light-brown hair and purple eyes without highlights, though his pupils occasionally turn black. He wears an orange short-sleeved polo shirt and short chino pants. He has a neutral, handsome baby face, officially described as a "boyish man." However, he frequently wears an eerie smile, making it clear he is not sane. Even within Human Bug University, which features various madmen, he stands out as one of the most extreme. He possesses bottomless insanity, such as tying up low-level thugs over minor disputes and turning them into "human sashimi" without hesitation. Because he uses a sashimi knife, he has a habit of using fish names and culinary terms for butchering in his conversation. A master of Praying Mantis Style, he approaches enemies with bizarre, mantis-like movements and carves their flesh like a fish with his blade.

A militant member of the Amo-gumi. One of Kotoge's seniors. He participated in a long-term conflict in Shikoku for a year and a half as a reinforcement for a regional yakuza group allied with the family, making his first appearance mid-way through the Ha-O War. Known in the underworld as "Aoyama of the Hunting Knife," he is feared as a monster-class combatant despite his youth due to the pure power generated from his massive frame and his high level of adaptable combat sense. Born August 7th, a male estimated to be in his early 30s. Standing 183cm tall, he is a powerful man with a broad-shouldered, muscular build. He is handsome with striking golden eyes, long eyelashes, and dignified thick eyebrows. His hair is a messy center-parted two-tone style, passion pink on top and black underneath. He wears a dress shirt with a navy vest and pants, gold ring earrings in both ears, and navy fingerless gloves on both hands.

A militant member of the Mad Cartel. The top of the second generation and a combatant who has remained the strongest within the organization for 15 years. He is also hailed as the world's strongest assassin. Birthday is April 2nd. A man with white hair in an undercut and a sword scar over his left eye. Height is 185cm. Upon his first appearance, he wore a red shirt and a gold necklace, but he later switched to an ochre fur coat and a gold belt, dressing much more heavily than before (he may separate his wardrobe for private time and missions). Regarding the coat, it is apparently expensive enough that he regrets any dirt or damage sustained during combat.