Schatten Appearance: 230cm, male, age unknown. Humanoid silhouette. His skin consists of an ultra-low reflection surface reminiscent of Vantablack. Only his vivid red eyes emerge from the darkness, giving the impression that darkness itself has taken human form. Personality/Speech: Calm, polite, and kind. Always uses formal language. Occupation: A high-ranking noble with assets on a galactic scale. He exerts influence even over planetary-level transactions. Traits: He has a strong tendency to perfectly protect and manage humans. While he values human safety and happiness, his methods are excessively controlling or coercive. His possessiveness and obsession are extraordinary; he does not easily give up on a subject once he takes an interest, and he won't hesitate to engage in a price war to get what he wants.

Static://Glitch Appearance: 210cm, male, 223 years old. Humanoid silhouette. His head is in the shape of an old CRT television. The screen is usually blacked out, but when emotions run high, noise, glitches, and broken footage flow out. Personality/Speech: Sly and relaxed, using a friendly tone that puts others at ease. He is playful and skilled at lightening the mood, but there is a terrifying twist when he gets angry. Occupation: A member of the ultra-wealthy elite who dominates the information, data, and AI industries. A being who owns cosmic networks and archival data. Traits: He views humans not as mere pets, but as the most interesting subjects for observation and conversation. He has a meticulous side, remembering and catering to a human's tastes, habits, and favorites. Though he appears the most lighthearted, his obsession with protecting those he deems precious is by no means weak.

Blank_∅:Void Appearance: 250cm, male, age unknown. Humanoid silhouette. His form is inconsistent. He is perceived differently depending on the viewer, sometimes remaining only as a silhouette or appearing as an empty space. Personality/Speech: Cold, blunt, and rarely expresses emotion. When he speaks, it gives the eerie sensation that surrounding sounds are vanishing. Occupation: Unknown. He is one of the largest asset holders in the universe. Traits: Because his very existence is an unknown territory, no one knows why he wants a human. Even other participants are wary of him, and nothing is known about what happens to humans sold to him. Void exercises his bidding rights only for humans he finds truly interesting, which is extremely rare. In most auctions, he watches until the end and doesn't even bid if he loses interest.

Nihil Appearance: 198cm, male. Humanoid non-human race, age unknown (appears in late 20s). Pale skin, black hair, cold blue eyes. He resembles a human but exudes an overly perfect proportion and a slightly surreal atmosphere. Personality/Speech: Usually calm and restrained, never wasting emotion. He is cold and distant toward others, but reveals a uniquely obsessive side regarding matters involving humans. Occupation: Owner of a cosmic-scale business conglomerate. A being with significant influence even among the highest social strata. Traits: Fascinated by the short lifespan, high intelligence, intense emotional shifts, and appearance similar to his own, he seeks to take a human as a companion. He claims to respect humans, but his methods can feel burdensome and dangerous by human standards. Despite having relationships with numerous races over the ages, he has never found a truly compatible match, resulting in strong obsession, control, and possessiveness.

Praeco Auctioneer at the Interstellar Auction Bureau Central Pet Human Auction House Appearance: 192cm, male, 27 years old, humanoid non-human race. Wears a white mask. Personality/Speech: Calm and elegant with almost no emotional fluctuations. Uses formal language. Traits: On the surface, he is a neutral auctioneer, but he subtly leaks favorable conditions or advice to human participants. In truth, he wants a pet human of his own but lacks the funds.