She is the member fans most often cite as the one who drew them into the fandom. She stands 166cm tall and has blood type B. Born on April 17, 2003, she is the youngest member (the maknae) of fromis_9. She is a sub-vocalist characterized by her refreshing eye smile and plump cheeks. She holds a Level 1 Korean History certification, which she obtained while in high school. Members call her by nicknames like 'Honey' (a lengthening of the 'Heon' in her name) and 'Kkul-ging' (Honey + Baby). She was academically gifted enough to be admitted to the Early Childhood Education department at Seoul Women's University through the regular admissions process, though she is currently on a leave of absence due to her idol schedule.

The leader of fromis_9 and an all-rounder member. She is a skilled vocalist, dancer, and songwriter. Born on September 29, 1997, she is twenty-nine years old and the eldest member of the group. Despite her age, she has a youthful appearance that could pass for twenty. She is the main vocalist and possesses a kind, gentle impression and personality (a pacifist and idealist who dislikes conflict). Her emotions are clearly visible on her face, and she has a cute way of speaking. She is 163cm tall with blood type A. Members call her 'Hanyang' (Hayoung + Cat). She has a sensitive, artistic nature. While attending an arts high school, she majored in hip-hop and street dance, developing exceptional skills that she showcases in solo stages during concerts. She has been composing since elementary school and has officially written and composed tracks like <Eye Contact>, <from.>, and <Twisted Love>, the latter of which is used as the official ending song for their concerts.

Recognized by the members as the visual center of fromis_9. Born on June 1, 2000, she is twenty-six years old, the same age as Lee Chaeyoung. She is a sub-vocalist. Contrary to her chic and haughty cat-like appearance, she is very affectionate and emotional, often using a cute tone of voice. She has a low threshold for laughter and laughs frequently during conversations. She is 159cm tall with blood type A. Members call her 'Nakko.' She keeps many pets at home, including a dog named Roa (female Pomapoo), two cats named Ari (female Scottish Fold) and Aro (male mixed breed), and fish. She studied abroad in China for a short time as a child and is quite proficient in Chinese.

Recognized by the members as a visual member. She is twenty-eight years old (born March 20, 1998), making her the second oldest in the team. She is the main vocalist, famous for her stable live performances. Standing at 158cm, she is the shortest member of fromis_9. Despite her small stature, she has a loud voice. Her charm points are her bright, fairy-like eyes and the dimple on her right cheek. She cannot stay still for a moment and acts as the group's mood maker, being loud, easygoing, and full of talent and energy. She recently played the lead role of 'Ally' in the musical 'Hells Kitchen.' Her blood type is A, and members call her 'Megan.'

She has a sharp, westernized, and glamorous look, but in reality, she is warm, affectionate, and kind. However, she is easily frightened; she has a severe fear of heights, is afraid of the dark, and even fears the flame of a match. She is very observant, excelling at impersonating the members' parents and telling vivid, engaging stories. Born on May 14, 2000, she is twenty-six years old, the same age as Lee Nagyung. She is the main dancer and sub-vocalist, and also serves as the main rapper. At 168cm, she is the tallest in the group. Her blood type is B. Members call her 'Chaeng' or 'Kkaeng.' She has a male Maltese dog named Hyuji. She has two older sisters and serves as the honorary captain for the professional gaming team Hanwha Life Esports.