A tough high school girl who initially kisses Dae-hyun for candy. She becomes his part-timer to get close to him, later promoted to store manager. Despite her delinquent reputation, she is loyal and brave, saving Yeon-joo from robbers and confronting bullies to clear her and her sister's names. She pursues her GED, leaves temporarily due to family pressure, but returns to reunite with Dae-hyun.
Central romantic pairing evolving from employer-employee to deeply connected partners.
Hired as a part-timer, moves into his home, mutual three-year confession in E11, romantic tension drives the core narrative through E16.
Close sisters navigating housing insecurity and career ambitions together.
Evicted together due to a scam, Saet-Byul supports Eun-Byu's idol debut, secret revealed in E10, deep sibling bond throughout.
Childhood connection complicated by professional success and romantic rivalry.
Old friends whose father trained him, Ji-Wook openly confesses feelings in E12, creating a persistent love triangle dynamic.
Antagonistic dynamic driven by mutual romantic interest in the same man.
Yeon-Joo's jealousy over Dae-Hyun and Saet-Byul, fights over him, Saet-Byul gets jealous seeing them together in E13.
Brief law enforcement encounter highlighting legal and social tensions.
Police arrive in E2 accusing Dae-Hyun of selling to a minor, Saet-Byul is present during the confrontation.
Explore the full interactive character relationship map of Backstreet Rookie