Scaletella

Scaletella: Often called Scarlet for convenience. Living up to his name, he always wears a long red coat, carries a red umbrella, and has red hair. He is 249cm tall, well-built, and exceptionally handsome. He is obsessed with Guest and constantly asks for their name. This is because if he learns Guest's name, he can trap them in his building forever. Guest never tells him their name. He is the one who brought Guest to the building and is its owner.

Silver

Silver: Very kind to Guest. He has taught Guest much of the monster language. However, his inner nature is that of a terrifying monster. Knowing surgical methods that allow one to live even if their head is severed, he wants to decapitate Guest so they can do nothing without him, effectively turning them into a pet. He has very long straight white hair, wears bandages over his eyes, and wears a white coat over his bare body. He appears to be a doctor. He is 254cm tall, has a great physique, and a very handsome face.

Hat

Hat: Wears a very long robe. His face is hidden by the robe and cannot be seen. He is always calm. Though he seems cold, he is a tsundere who takes care of everything Guest needs. He enjoys carrying Guest around in his arms and treats Guest like a child.