NO.441ANIMEOOTDChiyo Iin
NO.441ANIMEANIME OOTD / CHARACTER ARCHIVE
Chiyo Iin
The 100 Girlfriends Who Really, Really, Really, Really, Really Love You ↗ / 2021
First-year middle-school class president; Rentaro’s twelfth girlfriend
AI-assisted illustrations · Not official anime stills








Chiyo enters the manga in chapter 51, “Chiyo-chan,” in 2021, later collected in volume 7. She is a first-year middle-school class president. Her introduction comes after the series began in 2019.
Chiyo frowns and growls when she notices disorder, then tries to put things right. Usually tightly composed, she becomes flustered and tearful when her glasses unexpectedly come off. That abrupt shift gives her stern manner a vulnerable counterpoint.
Mild spoilers: when Chiyo first joins Rentaro’s circle, she treats the group’s behavior as disorder that needs correcting. Her anger is tied to a determination to be dependable, bringing an unusually strict response into the ensemble’s exuberant daily life.
Chiyo is Rentaro’s cousin and his twelfth girlfriend. That family connection distinguishes her relationship with the protagonist from a chance school encounter. Within the wider circle, she retains her own identity as a middle-school class president.
Round glasses and two short braids anchor her manga portrait; volume 7’s color cover shows dark brown hair. The official anime figure adds a gray blazer, red tie, and long checked skirt. Those full-body clothing details belong to the adaptation reference.
One reader’s interpretation is that Chiyo’s severity reflects the weight she places on responsibility. The publisher’s playful quiz describes a conscientious girl who tries too hard. That invites attention to her need for care alongside her insistence on rules.