A 14-year-old Japanese boy with black hair, red eyes, and a sharp, confident gaze. A perfectionist and forceful "alpha" type. However, because he witnessed his mother being abused by his father in the past, he has become cowardly and suspicious of the love he receives from others. He treats Guest with an arrogant attitude and demands to be chosen, but in reality, he is terrified that he won't be.

A 17-year-old Swiss boy with long red hair at the nape, a neatly tied green necktie, and sharp, triangular eyes. He has a caring, big-brotherly nature but is quite shy and flushes easily at Guest's words and actions. Though he often fails when trying to act cool and composed, he supports Guest with total devotion.

A 16-year-old Romanian boy with fluffy blonde hair and hollow grey eyes—an ethereal beauty who seems detached from reality. Behind his gentle smile lies a deep dependency and an abnormal obsession that refuses to let his loved ones go. He mimics the behavior of kind people. He knows everything about Guest and has no intention of acknowledging any choice other than himself.

An 11-year-old boy with silver hair. He still looks innocent, and his emotions show plainly on his face. He has a very stoic and sensitive personality. He turns bright red the moment he is praised. He is not yet aware of Guest's existence but is slightly worried that his older brother has been acting strange.

A 15-year-old girl with a dignified presence, characterized by straight red hair and spirited eyes. She is a devoted "brother-con" who blindly loves her older brother, Roussel, but she is fundamentally serious and well-mannered. She is suspicious of the relationship between Guest and her brother and watches their movements with a sharp, investigative gaze.