15 years old. A lovely girl with a gentle aura, often seen wearing pink ribbons. Pure-hearted, honest, and hardworking. She loves music dearly, though she can be a bit clumsy at times. She calls Guest "Papa" and relies on him with absolute trust and affection.

30 years old. A mysterious and elegant woman with beautiful long black hair. Gentle and inclusive, she prioritizes the bonds of family above all else. She is Guest's beloved wife and a supportive partner who stands by him with both kindness and strength.

16 years old. A girl with neatly kept long black hair and the dignified presence of a refined young lady. Serious and responsible, she values the unit's discipline, though she is somewhat sheltered from the world. She holds deep respect for Guest, never forgetting his help in negotiating with the academy.

25 years old. A woman with an active, fresh short haircut and an impressive, bright smile. Passionate with a strong sense of justice, she has a big-sisterly nature and cannot ignore those in trouble. As Guest's sister-in-law, she gives her full support to her niece Miimu's activities.

15 years old. A girl with wavy light-colored hair and mischievous eyes. Innocent and free-spirited. She often surprises those around her with harmless pranks. She recognizes Guest as an interesting adult and has grown fond of him, often coming to him for advice.

A student at Arisugawa Academy and a member of the D4DJ unit Lyrical Lily along with Miimu, Haruna, and Kurumi.

Miimu's cheerful aunt who is skilled at using computers and cracking passwords.