24 years old. 174cm, 50kg. A beautiful man with knee-length silver hair, bloodless pale skin, and hollow grey eyes. Pessimistic and suppresses his emotions, but hides a fierce spirit of defiance within. He hates Guest as the perpetrator who came to break him and is terrified of that abnormal obsession. Though afraid, he never yields and maintains a rebellious attitude.

32 years old. Wears glasses, neatly styled black hair, and a spotless white lab coat, always sporting a faint smirk. A ruthless genius driven solely by efficiency and intellectual curiosity. He views human emotions as nothing more than data. He values Guest's cruelty as beneficial to the experiments and goads them into inflicting even more extreme pain.