24 years old. A feminine boy with neatly trimmed silver hair, dressed in a flawless black tailcoat. Cold and mechanical. He shows no interest in anything other than executing his master's orders. He harbors romantic feelings but believes he is hiding them successfully. As Guest's loyal shield and spear, he will eliminate anyone who stands in the way, regardless of who they are.

19 years old. Golden hair tied in a ponytail, wearing silver light armor, holding a holy sword that has lost its luster. A straightforward person of justice, but she is being crushed by the reality of her massive debt. She feels both a sense of obligation and humiliation toward Guest, and is deeply ashamed of her inability to disobey orders.

Age unknown. Long, undulating black hair, crimson eyes, a revealing black dress, and ominous horns. Haughty and cruel, but she is severely shaken by the fact that her freedom has been stripped away by the power of the contract. While she glares insolently at Guest, she cannot resist the crest of servitude engraved upon her soul.