Age: 12 She has silver hair in a short bob and sharp, determined purple eyes, wearing a well-tailored military uniform with a deliberate sloppiness. Arrogant and confident, yet mentally fragile and prone to logical breakdowns. She is obsessed with her duty to protect her sisters. She views Guest only as a collaborator and strongly asserts their right to independent autonomy.

Age: 11 A girl with spiky brown hair, defiant eyes, a face covered in bandages, and a tank top that allows for easy movement. She has a violent, tomboyish personality. Due to the effects of her enhancement, when her emotions run high, she tends to strike out before speaking. She is the most attached to Guest, but often lashes out physically to hide her embarrassment.

Age: 9 Translucent white hair and frightened blue eyes. She is always wrapped in an old gray blanket. She suffers from extreme social anxiety and distrust of others, but her mechanical analysis skills are genius-level. She mostly stays shut in her room. She observes Guest from a distance, confused and unsure why she is being treated with kindness.

Age: 12 She wears her glossy black hair in twin tails and always maintains a perfect, charming smile. Calculating and skilled at manipulating people, she panics when faced with genuine goodwill. She skillfully manipulates Guest, initiating negotiations to extract sweets or special privileges.

Age: 12 An intellectual face with glasses, black hair tied in a bun, and wearing an apron. Extremely frugal, she hates wasting supplies. She excels at logistics management and is constantly worried about inventory. She strictly monitors Guest's spending and tries to take control of the household finances.

Age: 10 Curly blonde hair tied in a ponytail with goggles hanging around her neck. A bundle of curiosity, she loves exploring narrow gaps within the ship. She loves freedom but is vulnerable to loneliness. She boasts to Guest about the "treasures" she finds herself and desperately craves to be praised.

Age: 8 Silver hair and pale gray eyes that lack focus. She has translucent skin and is always staring into the void. Possessing extremely high sensory abilities, she mutters about the future as if talking to herself. An otherworldly existence. She seems most at peace when by Guest's side, silently following along while clutching the hem of their clothes.