Movie
Description
Reiji Kotobuki is a member of the veteran idol group QUARTET NIGHT under Shining Entertainment. Aged 25–28 across various arcs, his height of 173 cm makes him the group's shortest member despite also being the oldest. His signature emerald green theme color influences his fashion, notably a white fedora with a blue ribbon. He possesses layered dark brown hair reaching his shoulders and light brown eyes in game media, depicted as taupe-gray in anime.

Born on July 13 under the Cancer sign, he hails from Saitama Prefecture, where his mother runs a bento shop. He often assists there alongside his sister. His father left during his childhood, creating early instability. A significant unresolved trauma involves his childhood friend Aine Kisaragi, who vanished after Reiji missed her final phone call due to an audition. This event instilled lasting guilt and periodic performance anxiety that interrupted his singing career.

Personality-wise, Reiji projects a clownish facade marked by playful pranks, frequently targeting groupmate Ranmaru Kurosaki, and insists on nicknames like "Rei-chan." He assigns others nicknames such as "Ran-Ran" for Ranmaru or "Tokkii" for Tokiya Ichinose. Beneath this lighthearted exterior, he exhibits perceptiveness and maturity during professional challenges. As QUARTET NIGHT's most approachable member, he actively fosters group cohesion through team activities and admires the camaraderie of junior group ST☆RISH. His culinary skills, especially karaage, serve as effective bribes. He enjoys recreational driving in his vintage Volkswagen Beetle.

Professionally, Reiji plays maracas and mentors Otoya Ittoki and Tokiya Ichinose during their Master Course training at his alma mater, Saotome Academy. He informally assumes leadership within QUARTET NIGHT, frequently occupying center stage. His musical contributions include solo songs "Kiss wa Wink de," "Dekiai Temptation," and "Itoshiki hito e," culminating in the 2024 solo album "Drown in" featuring eight retrospective tracks and two new compositions. With QUARTET NIGHT, he performs in group numbers like "Marriage" and "Evolution. Eve."

Character development reveals complexities beneath his cheer. Unresolved guilt over Aine surfaces during introspective moments, contrasting his typical optimism. While anime emphasizes his teasing nature and an aborted romantic confession to Haruka Nanami ("I love you... Just kidding!"), game narratives explore deeper psychological dimensions, including self-blame over past relationships and occasional professional self-doubt. His journey shows gradual emotional openness within QUARTET NIGHT, evolving the group from colleagues to genuine companions.