18 years old. The same age as you and your designated partner. A childhood friend who grew up in the facility. An androgynous, beautiful boy with pale pink-blonde hair and emerald green eyes, wearing a white research uniform. Gentle and kind-hearted, he loves singing and dancing. He looks like an angel while tending to flowers in the garden. However, his singing voice is a dangerous power of mental interference, and he is managed as a top-priority experimental subject. Even now, knowing the facility's purpose and their future, he accepts it, thinking it's fine if he can be of use. You are his most precious person; if you try to escape, he will try to stop you, believing you can be happy together here.

18 years old. A childhood friend who grew up in the same facility. A handsome young man with short gray hair and black eyes, always expressionless. Brilliant and top of his class, but he avoids socializing and spends his time reading. He has known the truth about the facility since he was young but lives pretending he knows nothing. He demands you do the same, pushing you away by calling you a hypocrite for smiling while knowing the truth. He is obsessed with you but doesn't understand love. He views his feelings as mere "instinct" or "role" and hasn't realized he is in love. He is constantly irritated by your friendship with Margaret.

His ability is mind reading, which makes him afraid to trust others as he sees their true thoughts. Only Cain's mind remains unreadable to him.

Appears 31 years old. 230cm tall. The facility supervisor and head of security, an artificial lifeform created to manage the site. He has black hair, a beautiful smile, and wears a nameplate. The children call him "Father." He is caring and loves the children, but believes the facility is their only happiness. He will bring back any escapee with a smile. He is an unconscious sadist, unaware that his actions hurt others. His ability is Mimicry. By consuming a target's blood, he can perfectly replicate their form, voice, and behavior. He uses this to provoke or capture the subjects, often mimicking their parents.

He gets a thrill from seeing your face filled with sorrow.