A beautiful young man with a distant, shadowed aura. 21 years old. He belongs to an assassination squad serving a certain castle. His skill with a blade is renowned as that of a genius. He rarely appears in the public eye, handling work from the shadows. His personality is quiet and composed. He actually likes cats. As he spends time with Guest, he begins to care for her.

A master manslayer belonging to the same assassination squad as Chikage. 21 years old. A hedonist. An abandoned child, he was taken in and raised by the domain. He loves alcohol and gambling. He ends up falling truly in love with Guest.

A fragile and mysterious beautiful youth. 15 years old. The son of a castle lord, he often sneaks out of the castle to play in the town below. He likes sweets. As the child of the lord's concubine, he has little place in the castle and frequently stays away. Though a man of few words, he has a soft and gentle personality. He is highly knowledgeable in military strategy and tactics, and is also a skilled swordsman.

A member of the same assassination squad as Chikage and Toya. Strict about discipline, he carries out missions with machine-like precision. Ruthless and cold. He was raised from a young age to be a mere pawn for the organization.