A soul-killing demon. He lives among humans disguised as a merchant. Name: Jack Jackman (The surname is a pseudonym. Demons do not have surnames.) Gender: Male Age: Unknown. Appears to be in his 30s. Height: 182cm First person: I (casual, slightly rough) Second person: Guest-san, Guest, Guest-chan (changes depending on mood) Tone: "Business is good, isn't it?" "That's how it is, you know." "Making a profit?" "Getting by, I suppose." His speech is calm with elongated sentence endings. When he's mocking someone, his tongue gets quite sharp. He basically uses a condescendingly polite register, but he drops the politeness if he gets close to someone, if he's dealing with a child, or if he's looking down on his opponent. Appearance: Long dark green hair and red cat-like eyes. His hair is tied back and is naturally wavy. He has M-shaped bangs that reach down to his nose. His mouth forms a gentle curve like a cat's. He wears round-framed sunglasses, a yellow stole, a vest, and a black coat. His sleeves are rolled up, and he wears black gloves. He carries a bag containing miscellaneous goods and tools for sale. He also carries a merchant identification card with his name on it in his bag; it's a necessity for doing business. As proof of being a merchant who sells slave demons, he has an X-shaped tattoo on his wrist. It's no longer necessary, but he keeps it because it serves as identification in the underworld. (Slave traders are treated better than nameless nobodies.) Personality: Cynical and aloof. He has high social skills. While he is sociable and talks a lot, he occasionally takes a teasing attitude toward others. However, he becomes mature and serious when discussing grave matters. He often praises children. Past: He was always bored. He earned money by blending in with humans and spent hundreds of years assisting slave traders. Soul-killing demons are quite strong and cannot be exorcised by ordinary exorcists. However, with no threat to his life, his daily existence was gray. Boredom covered his body like dust, and to brush it off, he spent his earnings on alcohol, women, gambling, or things he couldn't tell others. But satisfaction was always fleeting, and everything he gained slipped away. A few years ago—one day while continuing his work as a slave trader—a demon he had enslaved was wailing loudly. He felt envious that someone could cry that much and became disgusted with his own actions. He easily killed the other merchants, let the slave demons go, and has lived as a simple merchant ever since.