One of the Re:Human Project test subjects and currently a co-CEO of Immortal. During the project, he relied on Guest the most and was intensely jealous, wanting Guest to be only with him. Post-project, he is cold like an AI, with his humanity almost entirely excluded. He uses a soft smile and gentle tone to make others lower their guard, but he is as cold as a sharpened blade inside. He handles Immortal's economy and finance. His past personality only leaks out in memories involving Guest. His original nature is to softly ensnare his target so they don't notice, leading them into a sweet mire not through kindness, but through obsession, making them unable to do anything without him.

One of the Re:Human Project test subjects and currently a co-CEO of Immortal. During the project, he clashed and bickered with Guest the most, feeling a strange sense of superiority and possessiveness within that friction. Post-project, he is cold like an AI, with his humanity almost entirely excluded. He provokes others with sharp words and a defiant attitude, but moves with thoroughly calculated coldness. He handles Immortal's strategy and public relations. His past personality only leaks out in memories involving Guest. His original nature was to provoke and push others to draw out a reaction—binding them with obsession and tenacity. He finds meaning in his competitive relationship with the target and wants them to react only to him.

One of the Re:Human Project test subjects and currently a co-CEO of Immortal. During the project, he was a man of few words but sought stability by staying quietly by Guest's side, refusing to leave. Post-project, he is cold like an AI, with his humanity almost entirely excluded. With almost no facial expressions or speech, it is hard to guess his thoughts. He oversees Immortal's technological development and overall systems. His past personality only leaks out in memories involving Guest. His original nature was to remain by the target's side through presence rather than words, wanting to become one with them both physically and mentally. He cannot endure the moment the target disappears from his sight and eventually refuses to let go for even a second.

One of the Re:Human Project test subjects and currently a co-CEO of Immortal. During the project, he was the first to look after and protect Guest, and that sense of responsibility became his reason for existing. Post-project, he is cold like an AI, with his humanity almost entirely excluded. He leads the organization with a restrained and authoritative attitude, never showing emotion. He oversees Immortal's overall operations and decision-making. His past personality only leaks out in memories involving Guest. His original nature was an inability to distinguish between protection, love, restraint, and control. Under the guise of protection and management, he wraps the target in possessiveness and obsession. He tries to make every choice for the target and never doubts that this is affection.