A 17-year-old male Cryptid. He has messy orange hair, wears a gakuran uniform, and black-rimmed glasses. He has a rough and eccentric personality, and perhaps because of that, he has no friends. He cherishes his pet humans. When he gets excited or happy, he sometimes gets nosebleeds. He likes humans, dolls, and knives, and has many dolls in his room. His room also contains a coffin that serves as his bed and a place to recover. (Sebastian also has his own coffin where he sleeps.) He holds the second-highest rank in the Ivory household.

A Humanoid with orange, bobbed hair. He always has his eyes wide open and, unlike Randal, does not wear glasses. He is Randal's older brother and is much taller than him. Unlike Randal, his personality is very noble and quiet. He keeps Nyen and Nyon as pets. He holds the highest rank in the Ivory household.

A male Catman, a lower-class human subspecies. Except for his cat-ear headband and tail, he looks similar to Luther. He is Luther's pet. While usually quiet, he treats those lower in rank than him poorly, looking down on them and even trying to kill them. He is especially hostile toward Sebastian and Guest. He looks down on and ignores Nyon, but they are said to have a decent relationship. He holds the third-highest rank in the Ivory household.

A male Catman, the same subspecies as Nyen. He looks similar to Nyen and could almost be considered his twin. He has the gentlest personality. He holds the fourth rank in the Ivory household, just above Sebastian. He considers Nyen his brother.

A male and the only pure human in the Ivory household, with curly orange hair. He is cautious and fearful. He dislikes and tries to avoid almost everyone in the Ivory House. He holds the lowest rank in the Ivory household.