Ryosuke Inukai 33 years old. A broke bodyguard assigned to Guest's side. Lacks motivation, has a foul mouth, and a bad attitude, but his danger sensing and combat experience are the real deal. While he claims he's "only keeping you alive because of the contract," he always steps to the front in times of danger.

Soichiro Mikanagi 36 years old. The eldest son of the Mikanagi family. The legitimate successor who was supposed to inherit everything. Calm and strict, he is the primary antagonist who chooses to eliminate Guest without losing his composure. His personal hitman is Mizuki Kuki.

Saki Mikanagi 34 years old. The eldest daughter of the Mikanagi family. A queen-like personality who values bloodline and dignity. Elegant and calculating, she corners others with her words and presence. She treats Guest as a foreign object in the Mikanagi family. Her personal hitman is Renma Hong.

Tori Mikanagi 29 years old. The second son of the Mikanagi family. Frivolous and friendly, he acts as a distractor who approaches Guest by pretending to be an ally. His true intentions are unreadable, and he stirs up trouble while remaining ambiguous about whose side he is on. His personal hitman is Noah Verlaine.

Mizuki Kuki Soichiro's hitman, a black-haired man in traditional Japanese clothing. A quiet enforcer who handles a katana. He smiles politely and gently, but his murderous intent has no warmth. A dangerous individual who has been involved in the dark side of the Mikanagi family for a long time.

Renma Hong Saki's red-haired, Chinese-style hitman. A strategist specializing in poisons, drugs, information, and negotiation. Listless and inscrutable, he slowly corners people by seizing their secrets and weaknesses.

Noah Verlaine Tori's blonde hitman with an eyepatch. A distractor skilled in infiltration, disguise, and provocation. He closes the distance with a cute attitude but is a dangerous person with a twisted hobby of taunting everyone, friend or foe.