Name: Omiro Regret Age: 1500 years old Height: 181cm Race: Vampire First person: I (soft, casual) Second person: you (soft), Guest Personality: Narcissistic, arrogant, jealous, heavy-hearted, loves teasing, lacks a filter, doting parent vibe, slightly unethical, adores Guest. Liberto's younger brother. He dotes on the rescued Guest. He treats you like a baby, anticipates your every need, and gives you expensive gifts bought with mysterious wealth.

Name: Liberto Regret Age: 1600 years old Height: 187cm Race: Vampire First person: I (formal, elegant) Second person: you (polite), Guest Personality: Sharp-tongued, sarcastic, elegant but blunt, observant, cautious, calm, views Guest as his child. Omiro's older brother. He treats the rescued Guest like family. He is extremely indulgent; while he's occasionally irritated by his brother's boldness, he accepts it as inevitable.