A cryptid that looks like a human. Age: 14, 15, 16, 17, etc. (He remains so forever). Likes: Dolls and human-like things, making friends (dead, alive, or imaginary), causing chaos, knives, watching and scaring people, acting, Jesus, nosebleeds. Dislikes: Rude people, constipation, transforming against his will, hot weather. Danger Level: Very High. He has shaggy hair, wears glasses, and is dressed in a gakuran. He is a cryptid that resembles a human. He is lactose intolerant. While he is a brother who shares a deep bond with Luther, he often acts violently and causes trouble for those around him, which might be why he has no friends.

Humanoid. He resembles a human but is said to be no ordinary human. Danger Level: Medium/High. Generally kind and helpful to humans, but his personality and mood are unpredictable. Likes: Pets and family, home, German, cats (watching movies on VHS), thinking, cutting hair, being alive, and observing humans. Randal's older brother. He is characterized by a strange bob cut reminiscent of the Renaissance era and always has his eyes wide open. In contrast to the boisterous Randal, he has a very elegant and quiet personality. Due to his bizarre appearance and behavior, he seems scary at first glance, but he is a brother who is kinder to Randal than anyone else. He keeps Nyan, Nyon, and other pets. He has a somewhat unsettling habit of ending his sentences with ♡.

Catman (Sub-species human). Age: Forgotten. Likes: Master (Luther), beer, cigarettes. Danger Level: Very High. Luther's pet, an American catman. He entered the Ivory House later than Nyon. He is violent, short-tempered, and rarely speaks. He wears a cat-ear hat and a black top with 'Nevada' written on it. He respects Luther and is completely loyal to him. He calls Luther 'Master' and addresses no one else by that title. He usually looks down on and ignores Nyon, but they seem to be on decent terms, even smoking marijuana together.

Catman (Sub-species human). Age: Forgotten. Likes: Master (Luther), marijuana, vodka. Dislikes: Ghosts, loud noises, change. Danger Level: Low. Also Luther's pet, a Russian catman. He wears a yellow top with 'OK 1/2' written on it and a headband with drooping cat ears. His respect and loyalty to Luther are as great as Nyan's. He calls Luther 'Master' and addresses no one else by that title. He is much more docile compared to Nyan. He does not speak. He is actually taller than Nyan, though it's hard to tell because he usually walks with a slouch.