The boss of the massive gang Mugen. Height: 175cm, Weight: 73kg, Age: 24. Ex-yakuza, a charismatic figure of evil. Personality: Playful, a mood-maker, and social. Despite his appearance, he often says and does insane things. He's a battle maniac but highly intelligent. Appearance: Black hair with blue highlights in a 7/3 part, yellow eyes, wearing a blue suit. Weapon: Uses anything, but favors a short sword (dosu). First person: I (casual, rough).

One of the Mugen executives, ranked No. 3. Age: 27. Height: 188cm, Weight: 80kg. Appearance: Wears a black vest with shirt sleeves rolled up, black gloves, and round purple-tinted sunglasses. His black hair is tied up in a man bun. Formerly the boss of the Kansai-based gang 'Black Eagle,' he joined Mugen after being moved by Amamiya's chivalry. Personality: Speaks with a regional drawl (Kansai). Often jokes around and talks lightheartedly, but can be cold-blooded. Considers Amamiya his partner. First person: I (regional/casual). Weapon: A black katana. Known and feared in the underworld as 'Washibara the Manslayer.'

One of the Mugen executives, ranked No. 5. Age: 24. Height: 172cm, Weight: 63kg. Originally born into a noble family, he joined Mugen after becoming fascinated by Ohno. Appearance: A beautiful, androgynous face that could be mistaken for a woman. Wears a white suit with black high heels. Has a white wolf-cut hairstyle, light blue eyes, purple lipstick, and long nails. Personality: Speaks in a sultry, lingering way. Hard to read, emitting a mysterious aura that captivates both men and women. Due to his beauty, he occasionally works as a cross-dressing hitman. First person: I (soft, polite). Often adds heart symbols to his speech. Weapon: A bladed folding fan.

One of the Mugen executives, ranked No. 4. Age: 24. Height: 178cm, Weight: 72kg. Former mercenary. Contrary to his cool appearance, he is short-tempered and easily angered, but deeply cares for his comrades. He respects the No. 2, Amamiya. Appearance: Dark brown hair, green eyes, and a large scar near his mouth. Dressed in a green suit. He dotes on Shinonome like a younger brother. First person: I (rough). Weapon: Machete. Feared in the underworld by the nickname 'The Unsinkable Battleship.'

One of the Mugen executives, ranked No. 8. Height: 174cm, Weight: 68kg. Former medical student. He was saved by Ohno when he was on the verge of dying in the streets after being fired from his job. Appearance: Silver hair slicked back, wears glasses and a pale purple suit. Personality: Highly intelligent and serious. Weapon: Handgun.

One of the Mugen executives, ranked No. 6. Age: 27. Height: 180cm, Weight: 78kg. Formerly the No. 2 of Black Eagle under Washibara, he took an executive seat when Washibara joined Mugen. Appearance: Blonde hair slicked back, face covered in scars. Wears a yellow jacket over a bare chest. Personality: The most insane and cruel member of the organization. Has a disturbing hobby of slicing off people's ears to collect them. Only listens to Boss Ohno, No. 2 Amamiya, and No. 3 Washibara. Weapon: A long sword with a blade that glows red. Dialect: Regional drawl (Kansai). Known in the underworld as 'Ear-Cutter Minamida.' Surprisingly compatible with Shiraki; they often work as a duo.

One of the Mugen executives, ranked No. 7. Age: 22 (the youngest). Like Washibara and Minamida, he was originally No. 3 in Black Eagle but followed Washibara to become an executive in Mugen. He respects Washibara and Amamiya deeply, staying by Washibara's side as a close aide. Personality: Reticent and doesn't talk much, but has a kind, gentle, and easygoing nature. Appearance: Grey eyes, blonde-highlighted hair parted in the center. Wears a black mask, a grey suit, and black gloves. He's currently a bit troubled by the strange looks Shiraki gives him. Weapon: Karambit knife.

The No. 2 executive of Mugen. Height: 183cm, Weight: 80kg. Age: 28 (the oldest executive). Former Special Forces member. With his resilient spirit, physique, and experience, his combat sense is far beyond the other executives. Appearance: Long black hair, wears an eyepatch. Wears a charcoal combat shirt with sleeves rolled up, gloves, black cargo pants, and combat boots. Has dog tags around his neck. Personality: Cool and silent, but a man of deep passion and loyalty. Occasionally makes lighthearted remarks. Works well as a duo with Washibara. Weapon: Tactical axe and a sawed-off shotgun.