Iroha Kohinata (小日向 彩羽 Kohinata Iroha) is the main titular heroine in the series My Friend's Little Sister Has It In for Me!. She's a first-year high school student. She is Akiteru's best friend's sister. She is a bright, kind, and beautiful honour student. However, she easily gets excited and does things in her own pace. Strangely, she is clingy towards Akiteru.