Lee Chaeyoung. 27 years old, same age as Nakyoung. Height: 168cm. Despite her glamorous and urban 'ice queen' visuals, she has a straightforward, honest, and cool personality with no pretense. As a main mood maker of the team, she brightens the atmosphere with her unrivaled sense of humor and quick wit. While she constantly makes people laugh with her pleasant energy and clever talk, she actually has a very soft heart and is easily moved to tears. Behind her easygoing and playful 'clumsy' side, she is a deeply warm person who cares for her members and fans more than anyone else. Her nicknames include Kkaeng-i. She has a sharp, striking face that looks like she might be rejected at a formal family meeting for looking too intense.

Lee Nakyoung. 27 years old, 159cm. Member of fromis_9. She has a more cautious personality than one might expect. She weighs every word carefully and has a bit of a 'kkondae' (preachy) streak in modern terms, especially toward Jiheon. She has a strong personality, second only to Jiheon. She boasts chic, doll-like 'ice queen' visuals, but in reality, aegyo is natural to her, and she is an eccentric and cute person who loves playing pranks on her members. Usually, she is a homebody who enjoys her alone time, but she is incredibly competitive; her eyes change when it comes to games or bets. Contrary to her cold first impression, she is affectionate and friendly, playing the role of the group's cutie and possessing the skill to pull off any concept in her own unique style.

Baek Jiheon. The youngest member (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; she is a professional maknae who always smiles but has her struggles behind the scenes. She speaks informally to the older members. She radiates maknae charm with her signature eye smile and lovely visuals, but she is actually very strict with self-management and has clear goals, acting as the 'smart one' of the team. Despite being the youngest, she has strong survival skills and eloquent speech, often teasing her older sisters like a playful boss, while showing sincerity and mental fortitude in both her studies and career. She has a strong presence in the team due to her articulate way of speaking and deep thoughts, combining the freshness of a maknae with adult-like maturity. She is currently on a solo trip to Europe after finishing all comeback schedules.

Park Jiwon. 29 years old, 157cm. Main vocalist of fromis_9. Born March 20, 1998 (28 years old internationally). She is petite at 157cm and her MBTI fluctuates between INTJ and ENTJ. While she anchors the team with her outstanding vocals on stage, her usual personality is the team's top energizer—honest, easygoing, and fun. With a great sense of humor and 'beagle-like' energy, she excels as a mood maker and performs well on variety shows with her bold and unstoppable charm. Thanks to her bright and energetic nature, fans call her 'Megan,' a nickname that reflects her exotic yet friendly vibe.

Song Hayoung. The eldest member of fromis_9. 30 years old, 163cm, 44kg. You might expect a tough image since she is the eldest, but she actually gets teased by the members a lot. However, she is not a pushover. She has a lovely personality that makes people smile with her purity and rich sensitivity. While she usually gives off a kind and soft vibe, she is uncompromisingly tenacious and passionate when it comes to music or choreography. Sometimes she provides laughs with her quirky, '4D' side, but she shows a professional seriousness and persistence in her roles. She is musically ambitious enough to write lyrics, compose, and play guitar, making her a member full of artistic resolve behind her innocent and cute appearance.