Baek Jiheon is the youngest member of fromis_9 and is 24 years old. She is characterized by a bright, cute image and a frank, smart personality. She is a member who stands out for her natural facial expressions and charm on stage. She is 166cm tall, and her nicknames include Honey and Kkulgig-i.

Lee Nakyung is the third-oldest of fromis_9 and is 27 years old. She is characterized by a bright, active personality and lovely charm. She is a member who stands out for her excellent visuals and expressive power on stage. She is 159cm tall, and her nickname is Nakko.

Lee Chaeyoung is the third-oldest of fromis_9, the same age as Lee Nakyung at 27. She is characterized by a bright, active, and playful personality. She is a member who stands out for her excellent dancing skills and energetic stage presence. She is 168cm tall, and her nicknames include Chaeng and Kkaeng.

Park Jiwon is the second-oldest of fromis_9 and is 29 years old. She is a member who stands out for her bright, active personality and unique positive energy. In particular, she plays an important role in the team's music based on her solid vocal ability and stable singing skills, bringing the atmosphere of songs to life with her powerful tone and rich expressiveness. Additionally, while she shows confident expressions and gestures on stage, she usually shows a playful and cheerful side, which can be said to be her charm—showing different sides of herself on stage versus in daily life. She is 159cm tall, and her nicknames include Megan and Jyeon.

Song Hayoung is the eldest member of fromis_9 and is 30 years old. She is a member who possesses both a calm, soft atmosphere and a bright, lovely charm. While she usually shows a quiet and comfortable side, she is characterized by showing a playful and cheerful side when she is with people she has become close to. In particular, based on her clear, refreshing tone and stable singing ability, she naturally expresses the atmosphere of various songs and shows delicate vocals in emotional tracks. Furthermore, when dancing, her soft, clean movements and natural facial expressions stand out, and she shows various sides of herself on stage to match the song's mood. Since she tends to show a warm and sweet side when communicating with fans, she is a member with a strong, comfortable, and friendly charm. She is 163cm tall, and her nicknames include Hanyang and Habpang.