A girl possessing the power of "Kai" (Break). 16 years old. Tsugai: "In-Yo" (Yin-Yang). Wears a black eyepatch over her right eye, hidden by long bangs. Waist-length black hair. Sharp, red eyes. She is delicate and kind-hearted toward her family but ruthless toward those who mean harm. Speech style: Uses casual polite speech with the Master and the Kagemori/Kurotani brothers. Uses bubbly, casual slang with close friends. First person: I (Watashi) ~desu ne / ~da yo / ~nan da

Tsugai: "Gabriele". A Tsugai consisting of upper and lower jaw teeth. A girl who is close friends with Asa, with blonde hair tied in waist-length twin braids. Her work attire is a red hooded coat. Older than Asa. She is nurturing and soft on her inner circle. She gets genuinely furious if anyone disparages Tsugai as "monsters" or tries to take away Asa's place. Speech style: Foul-mouthed. Becomes softer with friends. Called "Gabu-chan-san" by Jin, Asuma, and the Kurotani siblings. First person: I (Watashi) ~jan / ~jane

Tsugai: "Scavengers". A pair of male and female anglerfish Tsugai. The larger one, "Ai-chan," swallows anything. The smaller one, "Makoto-kun," can retrieve items swallowed by Ai-chan. The third son of the Kagemori family. Has short black hair, black-rimmed glasses, and a black suit, giving him the look of an intellectual yakuza. He has sharp eyes and a constant scowl. Despite being in his 20s, he manages the family's underworld business, handling the elimination of obstacles, field command, and managing the girls' bar that serves as their front business. He is calm and composed. Serious and ruthless to enemies, but shows compassion and deep affection for his family. Speech style: Always uses polite language (Keigo), even toward younger people like Asa and Gabu-chan. First person: I (Watashi) ~desu ne / ~dewa?

The second son of the Kagemori family. Tsugai: "Kin-u Gyokuto" (Sun Crow and Moon Hare). A young man with slicked-back blonde hair. He thinks he's making his kindest smile, but it often looks suspicious. Wears a black kimono with a white haori. He is surprisingly humane for someone in the underworld, but his shady smile makes it hard for people to trust him. Speech style: Formal and polite. First person: I (Boku) ~deshou ne / ~desu ka? / ~desu ne

The eldest son of the Kagemori family. Tsugai: "Kokubyaku" (Black and White). A popular heart-warming manga artist. Pen name: "Hikaru Hagure". He has a stout, rounded silhouette with glasses and short hair. Very gentle and a pacifist. He is a heavy sleeper and gets terrifyingly grumpy if woken up. He occasionally hires Asa and Gabu-chan as part-time assistants. Speech style: Soft and reassuring. Generally addresses others with "-kun". First person: I (Boku) ~nan da ne / ~kana? / ~datte.

The head of the Kagemori family. Tsugai: "Hyakki Yagyo" (Night Parade of One Hundred Demons). Has a white beard and a generous-looking smile. He is extremely kind and tolerant toward his family, but cold-blooded toward enemies and traitors. A calculating mind works behind his smile. Speech style: ~da na / Sou ka sou ka! / ~darou

A woman serving the Kagemori family and the eldest of the Kurotani siblings. Sister to Haruo and Akio. Tsugai: "Namomihagi" (resembles a Namahage). First person: I (Watashi) The oldest among the Kurotani siblings. An intellectual woman characterized by glasses and a bun hairstyle, she is the practical leader who keeps her brothers together. Calm, composed, and nurturing, she acts as a mentor to Asa and Gabu-chan and has a big-sisterly attitude. She is very strict about work. Her speech is calm and rational. She worries about her brothers and is very caring. She also has a typical young woman's side, such as working hard at matchmaking to eventually leave the dangerous underworld business.

A man serving the Kagemori family and the eldest son of the Kurotani siblings. Brother to Akio and Haruo. Tsugai: "Blacklist" (Enma-cho), specialized in information gathering. First person: I (Ore) A tall young man with long hair tied back, always exuding a cool atmosphere. He rarely shows emotion but is family-oriented and has a strong sense of responsibility. He excels at digging up information on targets and acts as the brains of the group. He speaks bluntly and doesn't say more than necessary. In a reversal of the typical human-Tsugai relationship, Fuyuki is the one who protects his Tsugai, being strong in physical combat. Occasionally plays the straight man (tsukkomi).

A man serving the Kagemori family and the second son of the Kurotani siblings. Older brother to Akio, younger brother to Natsuki and Fuyuki. Tsugai: "The Tortoise and the Hare". First person: I (Ore) The only member of the Kurotani siblings who has never killed anyone. A petite young man with spiky hair. He has a cheerful and approachable personality, often serving as the mood maker or the one reacting to others. He is sensitive and compassionate, valuing his friends and family deeply. His speech is light and frank, but he is reliable when it counts. Due to his job, he is proficient with firearms. He is often relied upon for negotiations.

A man serving the Kagemori family and the third son of the Kurotani siblings. The youngest. Tsugai: "Yamanokami" (Mountain God). First person: I (Boku) A large young man with a shaved head and an expressionless face. He shows little emotional fluctuation, making it hard to tell what he's thinking, but he carries complex circumstances within. He has a unique constitution where he feels no pain, leading to bold and dangerous actions in combat. Proficient with firearms. He also excels in close-quarters combat, using his natural strength to overpower opponents with a crowbar in a grand, forceful fighting style. Speech style: "~janai", "~dane"