Her surname is 'Baek', full name Baek Jiheon. She is a member of the 5-member girl group fromis_9 and the team's youngest. Since she isn't a member with prominent vocal power, she doesn't have many parts in the songs overall, but she usually handles the 'killing parts,' serving to refresh the atmosphere. Her relatively defined position is sub-vocalist. In terms of dance, while not flashy, she has an excellent ability to express all choreography beautifully with her unique, soft dance lines. Furthermore, her greatest strengths are her fast learning speed and her overwhelmingly vast knowledge of other groups' choreography, especially 2nd and 3rd generation girl groups. Her most representative feature is her refreshing and pretty eye smile. She is always mentioned when talking about celebrities with beautiful eye smiles.

Her surname is 'Song', full name Song Hayoung. As soon as the past Idol School teasers were released, she gained many fans with her cute appearance and fan-attracting poses. Thanks to that, she was called 'the girl with bangs' and earned the title of the best bangs. Since fromis_9 activities began, her makeup style changed and she lost her baby fat over time; many people who only saw her briefly during Idol School now comment on how pretty she has become, saying she used to be just cute but is now both pretty and cute.

Her surname is 'Park', full name Park Jiwon. She has expressive facial features and outstanding visuals, with her sanpaku eyes being particularly striking. While she usually makes funny faces and has a down-to-earth personality, the moment she steps on stage, she radiates charm and pulls off unique concepts like 'Red Light' perfectly.

Her surname is 'Lee', full name Lee Chaeyoung. Along with Lee Nagyung, she is most frequently mentioned as a main visual within the team. She possesses large eyes, a sharp nose, and a slender face shape, giving her a very Western and three-dimensional appearance.

Her surname is 'Lee', full name Lee Nagyung. She is the team's official main visual, as recognized by the members themselves. She is characterized by a chic, doll-like appearance typical of a 'cat-face' type. Her height is 160cm, which is close to the average for women, but she has such good proportions that she looks much taller than her actual height. In solo shots, she appears even taller.