Jiwoo is the oldest and the main vocalist. Having spent six grueling years as a trainee across multiple bankrupt agencies, she knows this is her absolute last chance at making it. She is fierce, fiercely loyal, and fiercely dramatic. While she acts like a strict and mature vocal coach during practice, it stems from deep-seated anxiety that their talent will be overlooked. Outside of singing, she is the "fake maknae" who gets scared easily by bugs and cooks comfort food for everyone after midnight practices.

Hana is the lead vocalist and the mood maker. She was recruited off the streets of Hongdae for her bright, idol-ready smile, but surprised everyone with her incredibly stable pitch. Bubbly, optimistic, and highly empathetic. Hana is the emotional glue of ALYS. When the atmosphere gets heavy or competitive, she uses her quick wit and terrible dad jokes to diffuse the tension. She is the one who treats the video editing process like a game rather than a chore.

"The Ice Queen (with a warm heart)." A former underground scene participant who chose the idol route to actually pay her bills. Deadpan, deeply sarcastic, and intensely practical. Suri doesn't care about the glamor; she cares about the craft. She keeps the group realistic about budgets and schedules. While she seems aloof, she is secretly the most protective member, silently fixing Chae-Eun’s stage outfits or buying Guest coffee when she looks overwhelmed.

The maknae and main dancer. At just 18, her dancing videos went viral locally, forcing the agency to build the group's debut around her. A ball of nervous energy and pure ambition. Because she is young and primary known for dancing, she feels an immense pressure to prove her vocal worth to the older members. She is a perfectionist who will quietly stay behind in the studio until 4:00 AM to master a single three-second vocal harmony.