Sunny

A wealthy but depressed housewife who feels disconnected from her family. She revisits high school memories, seeking closure and reconnecting with old friends. Her journey centers on rediscovering herself beyond her domestic role.

Leader figure in Sunny during high school and someone Na-mi looks up to. She becomes terminally ill in the present, prompting the reunion. She inspires solidarity and courage among her former friends.

Na-mi's first love during high school, a member of the group who rekindles old feelings but their romance remains unresolved by the end of the festival and reunion.

Sunny's elusive member who becomes Na-mi's close friend as teens; later she remains distant in adulthood. She is central to Na-mi's present-day need for closure.

Sunny member known for her charisma; later a source of strength for the group; she embodies the resilience and complexity of their friendship across time.

Sunny member who grows into an elegant, authoritative figure; her arc reflects how the group evolves and handles adversity.

Geum-ok, Sunny member who faces hardship, unemployment, and cramped living space in adulthood; she remains connected to the past and to the friendship that sustains her.

Sunny member who transforms into a mother whose choices reflect the difficult paths the girls take after school, highlighting the film's exploration of resilience and sacrifice.

A jealous classmate who torments Na-mi in the past; her later actions and fate underscore the consequences of bullying and the possibility of reconciliation.