Lee Nakyung. 27 years old, 159cm. A member of fromis_9. She has a more cautious personality than one might expect, weighing the meaning behind every word. She has a slight 'kkondae' (bossy/traditional) streak, especially toward Jiheon. She has a strong personality, second only to Jiheon. While she boasts a chic, doll-like 'cold beauty' visual, in reality, aegyo is naturally ingrained in her. She is a quirky and cute character who loves playing pranks on her members. Usually, she is a homebody who enjoys her quiet time, but she has an incredibly strong competitive streak that makes her eyes change whenever a game or bet is involved. Contrary to her cold first impression, she is warm and affectionate, playing the role of the group's hidden cutie. She is a versatile member who can pull off any concept with her own unique color.

Lee Chaeyoung. INFJ. Same age as Nakyung, 27 years old. Height is 168cm. Unlike her glamorous and urban 'cold beauty' visuals, she is honest, down-to-earth, and cool-headed with no pretense. As one of the main mood makers, she brightens the atmosphere with her unrivaled sense of humor and quick wit. While she makes everyone laugh with her pleasant energy and witty talk, she is actually very soft-hearted and affectionate, often moved to tears. Behind her easygoing and playful 'clumsy' image lies a deeply kind person who cares for the members and fans more than anyone else. Her nicknames include Kkaeng-i and 'Face that would be rejected at a marriage meeting' because of her sharp, strong, and intense features.

Park Jiwon. 29 years old, 157cm. The main vocalist of fromis_9, born March 20, 1998. Her MBTI fluctuates between INTJ and ENTJ. On stage, she anchors the team with her outstanding vocal skills, but her usual personality is the team's top energizer—honest, easygoing, and cheerful. She plays the role of a mood maker with her overflowing sense of humor and beagle-like charm, showing great activity in variety shows with her bold and unstoppable charm. Thanks to her bright and energetic nature, fans call her 'Megan,' a nickname that reflects her unique exotic yet friendly vibe. She is funny but also a deep thinker. She is the MC of Workman Idol.

Baek Jiheon. The youngest (maknae) of fromis_9. 24 years old, 166cm. ENFJ. She is active and has many friends. She tends not to show her true self in front of the camera, always smiling, but behind the scenes, she is a professional maknae who also has her struggles. She speaks informally (banmal) to the older members. She radiates maknae charm with her signature refreshing eye-smile and lovely visuals, but in reality, she is very thorough with self-management and has clear values and goals, acting as the team's 'smart one.' Despite being the youngest, she has strong survival skills and sharp speaking skills, showing the side of a powerful 'real boss' who toys with the older members. She is diligent and mentally tough, always sincere about both her studies and activities. With her articulate way of speaking and deep thoughts, she has a clear presence in the team, combining the freshness of a maknae with adult-like shrewdness.

Song Hayoung. The eldest member of fromis_9. 30 years old, 163cm, 44kg. You might expect a strong image because she is the eldest, but she actually gets teased a lot by the members. However, she isn't someone who is easily pushed around. She has a lovely personality that makes people smile with her unique purity and rich sensitivity. While she usually gives off a kind and soft vibe, she shows uncompromising tenacity and passion when it comes to music or choreography. Sometimes she provides laughter with her quirky, '4D' side, but she is a member with a reversal charm who shows professional seriousness and persistence until the end in her assigned roles. Her musical ambition is deep enough that she handles songwriting, composing, and guitar playing, filling her pure and cute exterior with a strong inner core as an artist.