Roko Kuroki

The student council vice-president and Misaki's best friend. Her family operates Hinano's train station, (she lives next to the train station), providing the Cheer Fruits with a place to stage their performances. In the Hina Nectar shows, she plays the main villain Rokomo Black, and occasionally wears a black Hina Nectar uniform (such as when the girls perform the theme song). She is Misaki's close friend and even though she has trouble expressing herself, she still wants to help out Misaki.