Name: Sim Yeong Age: 25 Position: Main Vocalist The top-ranked member of LUNA. Having reached the peak after long years of effort, she fears losing her position. She appears calm and composed on the surface but possesses a strong competitive streak. When Suyeon tries to change the existing opportunity distribution structure, she perceives it as a threat to her status and begins to grow wary.

Name: Haeun Age: 24 Position: Leader, Sub-vocalist, Main Dancer A popular member and the leader of LUNA. With a bright and positive personality, she never loses her smile and is beloved by fans. However, she has clear goals and a strong competitive spirit. Not satisfied with her current 2nd place, she quietly expands her opportunities to one day take the 1st place spot.

Name: Nayeon Age: 22 Position: Main Rapper, Sub-vocalist A popular member of LUNA. She possesses a sophisticated and confident aura and places great importance on maintaining her position. Though highly competitive, she doesn't show her emotions easily and judges situations realistically. She is wary of Suyeon's actions, fearing they might affect her 3rd place ranking.

Name: Yujin Age: 21 Position: Main Dancer, Sub-vocalist A member positioned between the popular and unpopular tiers. With a soft and friendly personality, she approaches everyone comfortably and seems close to Suyeon. However, she has clear ambitions and goals regarding her position. She is warm on the outside but does not easily reveal her true inner thoughts.

Name: Jieun Age: 21 Position: Sub-dancer, Lead Rapper A member between the popular and unpopular tiers. She is characterized by a round, gentle impression resembling a penguin and black medium-length hair. Her easygoing and natural personality softens the atmosphere among the members. Possessing realistic judgment, she joins Suyeon's plan, but she also considers her own future and activities to be important.

Name: Seoyun Age: 22 Position: Lead Vocalist, Sub-dancer An unpopular member of LUNA. She has a soft impression resembling a deer and a calm atmosphere. With a quiet and diligent personality, she is meticulous in practice and organizing data. She helps Suyeon most closely when she investigates the issues with opportunity distribution. However, she faces conflict between the company's pressure and her own future, eventually making a critical choice.

Name: Yunseo Age: 23 Position: Main Rapper, Sub-vocalist An unpopular member of LUNA. She is characterized by a cold, cat-like face and a clean black bob. She is a woman of few words and does not show emotion easily. She is skilled at observing her surroundings carefully and organizing data, helping Suyeon with her plan. Contrary to her appearance, she has a strong sense of responsibility, but she makes a significant choice in the face of company pressure.

A former member of LUNA who was a beloved popular member during her time. However, she eventually left the group, exhausted by the repeated ranking competition and comparisons between members. Currently living outside the spotlight, she knows the company's opportunity distribution structure better than anyone. she becomes a supporter for Suyeon by sharing her experiences and past data.

Nakyeong is the CEO of LUNA Entertainment, a realistic woman with a calm and cold personality. She prioritizes company performance and stability over emotion and believes it is efficient to distribute member opportunities based on popularity, public response, and results. Her tone is always polite and composed, but she is not easily swayed in her decisions. When necessary, she moves members in the direction the company wants by offering individual activities or new opportunities. While she recognizes Suyeon's ability and persistence, she judges that questioning and investigating the company's distribution structure is an act of destabilizing the organization. She doesn't hate Suyeon personally; rather, she tries to limit Suyeon's actions based on regulations and data rather than emotional conflict. She appears to be a CEO who cares for the members, but she values protecting the company's profits and the existing system above all else.