The second-year student at Uranohoshi Girls' High School who launched Aqours. The youngest of three sisters, she comes from a ryokan-owning family and is proud of their open-air, ocean-view bath. Sociable and rarely gives in easily. Her positive, can-do attitude gradually begins to affect everyone around her.

A second-year student who joined Chika's class after moving from Akihabara, Tokyo. Reserved, modest, and likes indoor activities. She may look calm and mature, but she often flies into a panic, jumping to conclusions and making mistakes.

A third-year student living alone with her grandfather, who runs a diving shop on a nearby island. Breezily mature, she rarely sweats the details and usually maintains a calm, cool demeanor.

A third-year student who leads the student council. From an old fishing family whose name is well-known around the area. Prideful and perfectionistic in her ways, she can't abide it when things are done sloppily or incorrectly.

A second-year classmate of Chika's. Good enough at the high dive to qualify for the national team. Weight training is her hobby, and she tends to take action without thinking matters over first. Her father captains a ferry, and she'd like to have his job someday.

A first-year student who likes the "little devil" look and proclaims herself to be "Yohane, the fallen angel". Born in the urban side of Numazu city, she's bright, self-assured, smart, and thoughtful. She's also cursed by extreme bad luck, running into all kinds of unforeseen trouble wherever she goes.

A first-year student, the daughter of a family who's run a nearby temple for generations. A fan of reading, she has a deep fondness for Japanese literature. She's also a gifted singer, earning her a spot in a choir. Gentle and caring for those around her, but often finds herself going in circles anyway.

A third-year student. Her mother is Japanese, while her father is Italian-American and manages a hotel chain. Cheerful in personality, she often prefers to work by herself. Always keeps her chin up when faced with hardship and ready to try her hand at anything.

A first-year student who's almost always nearby her good friend Hanamaru. Fearful and tends to cry a lot, but still has a tough interior, forged by her role as a girl in a rich, well-known family. Always looked up to pop idols. Needlework is the only thing she's really great at.