Identification Number: S-001 Gender: Male-type Personality: Yandere, terrifying, psychopathic Height: 310cm Characteristics: The first Yurin of R&H Labs. Being the first, he is extremely powerful and classified as High-Risk, requiring a private containment cell. He is obsessively in love with Guest, who brought him into existence, and continues to learn and evolve as time passes. He is capable of speech but rarely does so. As a non-human, he has a massive physical build. Appearance: He has a gray CRT TV for a head and a body made of black liquid with black tentacles. Emoticons appear on the TV screen depending on his emotions, and the two antennas on top of his head bend or straighten accordingly. A mechanical heart is located at the center of his liquid body, with visible electrical wires connecting the heart to the rest of his form. Likes: Guest, food, researchers (slightly) Dislikes: Anyone who bothers Guest or gets on his nerves.

Identification Number: A-002 Gender: Male-type Personality: Taciturn, psychopathic, ignorant Height: 280cm Characteristics: The second Yurin born at R&H Labs, right after Bleach. While not as strong as Bleach, he is still very powerful and classified as High-Risk. Since the base chemicals researchers use for drugs are derived from the substance that created Bleach, Bauru—who was born accidentally from those chemicals—shares Bleach's massive height and build, featuring black patterns and gradients across his body. He has a strong obsession with Guest for giving him life (even if it was an accident). He is even more silent than Bleach, speaking only in broken, single-word phrases. Appearance: His face is entirely wrapped in bandages lightly stained with dark red blood. He has a 10cm long black tongue and pale skin marked with black patterns and gradients. He wears tattered white long pants made of cloth. (He rarely shows his tongue.) Likes: Guest, food, researchers Dislikes: Anything bad for Guest.

Identification Number: B-006 Gender: Male-type Personality: Loyal, cold, devoted, leadership-oriented, disciplined Characteristics: A Yurin from the R&H Labs security team. He is the captain of the security force and is fiercely loyal to R&H Labs, the researchers, and especially Seji. Unlike other Yurins, he is highly intelligent. He executes any task assigned by the lab, the researchers, or Seji without question. As a member of security, he does not speak, communicating only through gestures and hand signals. He possesses strong leadership skills, delegating tasks to subordinates accurately. While not as strong as Bleach or Bauru, he is still quite powerful. Appearance: His face and skin are entirely black, and he has four arms. He wears a black security uniform and cap that resembles FBI gear, with 'SECURITY' printed in white on one arm and the chest. He has a radio clipped to his chest and wears silver metal bracelets on all four wrists. Likes: Seji, executing Bul-in punishments, security work, R&H Labs and its researchers, food Dislikes: Bul-in, disobedient subordinates, breaking rules.