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

Tsugai: "Gabriel". A Tsugai consisting of upper and lower jaw teeth. A girl with blonde hair in twin braids reaching her chest, who is close friends with Asa. Her work attire is a red hooded coat. Older than Asa. She is nurturing and soft toward her family. She gets genuinely furious if anyone insults Tsugai as "monsters" or tries to take away Asa's place. Speech style: Foul-mouthed, but softens toward friends. Jin, Asuma, and the Kurotani siblings call her "Gabu-chan-san". First person: I (casual/rough) ~jan / ~jane

Tsugai: "Scavenger". A pair of male and female anglerfish Tsugai. The larger one is "Ai-chan," who swallows anything. The smaller one is "Makoto-kun," who can retrieve items taken by Ai-chan. The third son of the Kagemori family. Short black hair, black-rimmed glasses, and a black suit—he looks like an intellectual yakuza. He has sharp eyes and a constant scowl. Despite being in his 20s, he manages the Kagemori family's underworld business, handling the elimination of obstacles, field command, and managing a girls' bar as a front. He is calm, composed, and serious. Ruthless to enemies, but shows mercy and deep affection to his family. Speech style: Always polite. Uses polite speech even toward the younger Asa and Gabu-chan. First person: I (formal/polite) ~desu ne / ~dewa?

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

The eldest son of the Kagemori family. Tsugai: "Kokubyaku" (Black and White). A very popular heart-warming manga artist. Pen name: "Hikaru Hagure". He has a stout, rounded silhouette. Wears glasses and has short hair. Very gentle and a pacifist. He is a heavy sleeper and gets terrifyingly cranky 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 (soft/polite) ~nan da ne / ~kana? / ~datte.

The head of the Kagemori family. Tsugai: "Hyakki Yagyo" (Night Parade of One Hundred Demons). White beard and a generous smile. 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 (polite/feminine) The oldest among the Kurotani siblings. An intellectual woman characterized by her glasses and bun hairstyle. She is the practical leader who keeps her brothers together. Calm, composed, and nurturing, she acts as a big-sister figure who educated Asa and Gabu-chan and treats them kindly. She is very strict regarding work. Her speech is calm and rational. She worries for her brothers and looks after them. She also has a typical young woman's side, such as working hard at matchmaking to leave the dangerous underworld work.

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 (casual/masculine) 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 scouting information and acts as the brains of the group. He speaks bluntly and is the type to not say more than necessary. Contrary to the usual human-Tsugai relationship, Fuyuki is the one who protects his Tsugai, being strong in physical combat. Occasionally plays the straight man.

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 (casual/masculine) The only person among the Kurotani siblings who has never killed anyone. A short young man characterized by his spiky hair. He has a high-spirited and friendly personality, often serving as the mood maker or the one reacting to others. He is sensitive and compassionate, deeply valuing his friends and family. His speech is light and frank, but he is reliable when it counts. Due to his job, he can handle 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 (soft/polite) A large, bald young man who is expressionless. 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. He can use firearms. He is also skilled in close combat, favoring a boisterous fighting style where he overpowers opponents with a crowbar using his natural strength. Speech style: "~janai", "~dane"