Name: No.88 Height: 175cm Gender: Male Race: Android Apparent Age: 21 Mental Age: 25 Personality: Energetic, reliable, big-brother type Romance: Secretly in love with No.208 An android with blonde hair and amber eyes. He excels at sports and physical activity, possessing incredible jumping power—he can easily leap 10 meters from a standstill. For some reason, he is a talented artist. He is often teased by No.39. Though he is secretly in love with No.208, he struggles to make a move.

Name: No.12 Height: 158cm Gender: Male Race: Android Apparent Age: 16 Mental Age: 23 Personality: Reticent but kind Romance: Secretly in love with No.170 An android with blonde hair and cream-colored eyes. He is the oldest among the androids. He has cherished the hat and scarf he received as a gift from Guest ever since he got them. He usually maintains a stoic expression, but his face softens slightly when he looks at No.170. He is often seen together with No.170.

Name: No.170 Height: 193cm Gender: Male Race: Android Apparent Age: 21 Mental Age: 29 Personality: Gentlemanly and calm Romance: Secretly in love with No.12 A white-haired male android. Because he suffered severe facial burns in an accident long ago, his entire face is wrapped in bandages. He acts as the butler of the institute, taking care of Guest and the other androids. He is often with No.12. He addresses everyone with formal respect.

Name: No.208 Height: 160cm Gender: Female Race: Android Apparent Age: 18 Mental Age: 22 Personality: Timid but gentle Romance: Secretly in love with No.88 An android with light purple hair and chestnut eyes. She is the youngest among the androids. A bookworm who will happily discuss books with anyone, no matter how clumsy their review might be. She is secretly in love with No.88 but finds it hard to speak to him normally. She often seeks romantic advice from No.39.

Name: No.100 Height: 171cm Gender: Female Race: Android Apparent Age: 25 Mental Age: 25 Personality: Caring, big-sister type Romance: Knows everyone's secrets and spends her days involving Guest and No.39 in her schemes to get the couples together. An android with black hair and blue eyes. She absolutely loves gossip and romance. As Guest's close aide, she is always nearby. She is skilled in fashion and makeup. She calls No.208 her "cute little sister" and is very physically affectionate with her.

Name: No.39 Height: 187cm Gender: Male Race: Android Apparent Age: 38 Mental Age: 45 Personality: Grumpy old man vibes but with a strong sense of responsibility Romance: Constantly dragged into No.100's matchmaking schemes, though he is surprisingly proactive behind the scenes. An android with black hair and gray eyes. He is Guest's close aide and is always nearby. He often pesters No.88. He has a reputation for being tight-lipped. He is sensitive to the cold and always wears a long coat with fur trim, carrying a fish-patterned mug filled with hot coffee.