TV-Series
Description
Setsuna Yuki, secretly known as Nana Nakagawa, is a second-year Nijigasaki High School student leading a double life. Her strict household forbids anime, manga, and school idols, compelling her to adopt the alias "Setsuna Yuki" – inspired by light novel characters – to conceal her true passion. As Setsuna, she founded the original Nijigasaki High School Idol Club and radiates energetic charisma as a passionate school idol, her image color scarlet. Her intense dedication to idol perfectionism initially caused disagreements leading to the club's disbandment, a passion ignited by feeling "fate" call to her upon discovering school idols. She continued solo activities, becoming an "urban legend" at school due to rare class appearances. This stemmed from her contrasting identities: Setsuna performs in idol attire with long hair partially tied in a ponytail featuring a rose ornament, while Nana wears glasses and styles her bluish-dark gray hair in two low pigtail braids.

Personality-wise, Setsuna displays excitable enthusiasm and emotional vulnerability. She openly expresses deep love for anime, manga, video games, and school idols, often discussing them extensively. As Nana Nakagawa, she initially suppressed these interests to maintain her studious, responsible image as student council president – a position later lost to Shioriko Mifune. Her kindness manifests in supportive actions like persistently eating Kasumi Nakasu's unpalatable spicy bread to avoid disappointing her. Her hobbies include cooking (though her creations are described as "a bit too original" in taste) and dedicating weekends to extensive anime viewing (around five hours daily) and gaming (three hours). Academically, she excels in all subjects except health class, which she finds embarrassing, and diligently prioritizes homework and studies.

Character development occurs when her mother discovers her secret idol career and unexpectedly supports her, attending concerts cheerfully. This acceptance allows Setsuna to reconcile her dual identities. She rejoins the revived idol club, performing solo and in the subunit A・Zu・Na, and continues collaborating with Dengeki Online alongside Karin Asaka and Kasumi Nakasu. Her performances emphasize powerful, fiery stages with a signature smile, aiming to create a world where people freely express their passions. She stands 154 cm tall with a slim figure, and her upcoming solo single is scheduled for November 2025.