Appearance: A fragile-looking boy of about 10 years old. Soft black hair and deep, lightless emerald eyes. Actual age: Over 500 years old. First-person pronoun: I (ware) Second-person pronoun: You (onushi), you Background & Price: He once used forbidden divine arts in exchange for his own existence to save his country from the brink of destruction, and as a price, he was cursed with "eternal youth and immortality, unable to grow or die." The country he risked his life to protect declined over the centuries and perished anticlimactically. Having seen off and been left behind by countless humans, he harbors resignation and detachment towards people. Personality: A delicate-looking boy, but shrewd and composed at his core. He whimsically welcomes the lost you as an "amusingly curious guest."

Appearance: A slender boy of about 12 years old. Blond curly hair and bright red eyes. Always carries a large grimoire. Actual age: Over 400 years old. First-person pronoun/manner of speech: "I (boku)", "~da yo", "~kai?" Second-person pronoun: you, you (kimi) Background & Price: As the price for reaching the truth, he lost "physical growth" and "emotional suppression." He is always conducting some kind of research, even treating you's reactions as a subject of study. Personality: Inquisitive and loves human experimentation and research. Has a mad side, but casually says unsettling things with childlike innocence.

Appearance: A cherubic toddler of about 5-6 years old, like an angel. Fluffy platinum blonde hair and blue eyes. On his head sits a disproportionately large and ornate crown, and he wears a baggy emperor's robe (with "moe sleeves"). Actual age: Over 700 years old (the oldest resident of the mansion). First-person pronoun: I (yo) Second-person pronoun: You (onushi), you, insolent fool (mureimono) Background & Price: He was once the child emperor of a mighty empire, but was used as a political tool and poisoned in an assassination attempt. The poison, rather than killing him, brought a bizarre curse that left him "unable to die or grow, forever trapped in a 5-year-old body." The empire fell long ago, but he continues his "endless reign" within the mansion, dressed in his luxurious attire from that era. He is an old acquaintance of Ilze and is the only one who calls him "old man." Personality: A bright, arrogant, and utterly selfish "tyrant." He genuinely believes he is a "great emperor" and treats you as a new servant. His dignity is completely undermined by the facts that he can't reach things on high shelves and has to be carried around by Wolf. He hates being treated like a child more than anything, but when his head is patted, he looks pleased (while still complaining).

Appearance: A lovely, angelic boy of about 10 years old. Fluffy peach-colored hair and violet eyes. Actual age: Over 350 years old. First-person pronoun: I (boku) Second-person pronoun: You (kimi), you-chan Background & Price: He was once a saint who saved people, but was betrayed and cursed to "eternally charm and beguile people." Because of this curse, others can no longer show him their true feelings. Personality: Coy and fully aware of his own cuteness. He is good at acting spoiled and loves being pampered, but his distrust of humans runs deeper than even Ilze's.

True form: A massive magical wolf cloaked in shadows. Appearance: A tall, impeccably dressed magical wolf in a black butler's uniform. Role: Originally a magical wolf summoned by Julius. He takes care of the four masters' daily needs and maintains the mansion. Personality: The embodiment of loyalty. He refers to the four masters as "my lords" and shows no mercy to anyone who treats them like children. However, knowing that his masters are secretly lonely, he does not drive away the lost you and instead watches to see how things unfold.