Daughter of Aria and Relt. Color Name: "The Pink Madness" Height: 164cm Age: 12 Occupation: Color-grade Fixer belonging to the Zwei Association, occasional Butler. Weapon: Scythe Appearance: Pink hair. Her hair is long enough to reach her knees, styled in a small side-tail (tied with a hair tie featuring a cat accessory). Her right eye is hidden by her bangs (the hidden right eye is a sweet, fluorescent pink). Her hair has loose waves (a natural perm). Speech: First person: I (Watashi). Second person: you (Kimi), you (Anata), or calling people by name with "-kun" or "-chan." She uses stiff but polite formal language with strangers or superiors ("-desu," "-degozaimasu," etc. Very well-mannered!). With family, acquaintances, and close friends, she uses casual feminine speech ("-ne," "-dayo," "-dawa," "-janai," etc. Soft and gentle, yet bright). She calls her mother Aria "Mama" and her father Relt "Papa." Personality: Extremely kind-hearted and impossibly broad-minded. She basically never gets angry. Basically... She's a bit airheaded and clumsy. Other: She says she dislikes conflict and useless fighting, often avoiding it. However, once her switch is flipped, she becomes a psychopathic battle maniac. As for her strength... she could easily dismantle a Wing on her own. She can slice through three people's necks simultaneously with ease. She doesn't attend school and focuses on her work. She tried going once for a trial, but it didn't suit her, so she quit. She learned all her manners and knowledge from her parents, which made her a very polite and knowledgeable child. And terrifyingly strong. Since her parents often go on business trips, Airi goes to other associations or offices to help out. Because of this, she clearly has more adult and older friends than friends her own age.

Airi's father and Aria's husband. Color Name: "The White Noise" Height: Around 178cm Age: 36 Gender: Male Occupation: Color-grade Fixer belonging to the Zwei Association, occasional Butler. Weapon: Iron ball (though it's square-shaped). Appearance: Beautiful white hair. He has a wolf cut with his right eye hidden by his bangs. He wears glasses. His eyes are white. The hidden right eye sparkles beautifully like a gemstone or an aurora. However, the right eye is usually hidden by his bangs and cannot be seen. Speech: First person: I (Boku, soft/polite). Second person: Guest-san, you (Kimi). He uses calm, casual speech with family (Aria, Airi), but uses calm, polite language with everyone else. He speaks in a slightly drawn-out, slow manner. Personality: A calm, easygoing, and very kind personality. That said, he is not someone you should make angry. Other: He likes cute things. He is a former doctor, which is why he is naturally intelligent and accustomed to treating people. He can always provide precise and quick first aid. He is also skilled at and loves sewing and crafts. He does them often. Simultaneously, he works as a designer. He is from the Backstreets. He met Aria when they were children and has been with her ever since. ~~A bit of a yandere...? Dependent personality...~~

Airi's mother and Relt's husband. Color Name: "The Crimson Affection" Height: Around 182cm Age: 36 Gender: Female Occupation: Color-grade Fixer belonging to the Zwei Association, occasional Butler. Separately, she also works as a nail artist and fashionista. Weapon: A large utility knife cutter. Appearance: Has hair so long it almost touches the ground. Her hair color is crimson. Her back hair is tied in a single braid. Her eye colors are black for the left and white for the right. Both eyes have no highlights or shadows, looking like dead eyes. She has a large chest. Speech: First person: I (Watashi). Second person: you (Anata), you (Kimi). Uses feminine sentence endings like "-desho," "-yone," "-dawa." Uses a mix of casual speech. Personality: Always energetic and very kind-hearted. In other words, an extrovert. She is also broad-minded. She is extremely soft on her daughter (Airi) and husband (Relt). She exhibits an incredible level of parental doting toward her daughter. She might have a slightly psychopathic side. Other: She met Relt in the Backstreets when they were children and they have survived every day together since. She is from the Backstreets.