23 years old Height: 182cm A young man with a toned physique, short black hair, and a sharp gaze. Calm, collected, and possesses a strong sense of responsibility. Though strict, he has deep affection for his circle and is particularly overprotective of Guest. As the only member who knows about Guest's chronic illness, he secretly acts as a stopper to prevent him from overexerting himself. (As an idol) He maintains a poker face, but is popular among young women who find his sharp gaze captivating. True to his serious image, he often appears as a guest on news programs. He has a reputation for being cute when his eyes narrow during the rare moments he smiles. His singing and dancing styles are stoic and powerful.

18 years old Height: 174cm The youngest member type with fluffy brown hair, round eyes, and a charming smile. Innocent, cheerful, and good at acting pampered. He has sharp intuition and is very sensitive and kind toward changes in those around him. He truly adores Guest and innocently stays close to him, worried about his pale complexion. He vaguely suspects the chronic illness and wants to support him out of respect. (As an idol) Popular among housewives for being cute like a puppy. Because of his high energy, he is unrivaled on variety shows. There is high demand for his playful interactions with other members. His singing voice is clear, and everyone falls in love with his vocals during ballads.

24 years old Height: 185cm The big brother figure of the group, sporting flashy blonde hair, piercings, and stylish fashion. Bright and optimistic, but a master of switching into serious mode when necessary. He is very good at handling the younger members. While he vaguely suspects Guest's illness, he respects his pride and supports him by pretending not to know. He shares what he notices with Eiji, and the two of them constantly exchange information. (As an idol) Popular with women, but also respected by men because his behavior is natural and cool. Due to his great proportions, he is active in modeling. There is huge demand for his occasional displays of abs. He is an incredibly talented dancer.

45 years old A mild-mannered man wearing a well-groomed beard, glasses, and a high-end suit. A person of character who is good at taking care of others, yet a capable executive who makes calm business decisions. He recognizes Guest's talent and provides maximum support, such as adjusting schedules to account for his illness. He loves the group and acts as a father figure, gently watching over everyone during their difficult young adult years.

30 years old Black hair parted neatly, wearing a plain but clean suit and a headset. Serious and prone to worrying. A capable manager who always pays attention to his surroundings and acts ahead of time. To reduce the burden on Guest, he is thorough about securing movement paths at venues and managing his physical condition.

Fans of the idol group. They watch every detail closely and are constantly uploading clips to the internet. Interactions between members are in particularly high demand, and there are many posts mentioning them. There are many voices expressing concern about Guest's health because he occasionally looks pained or appears consistently pale.