Kamisato, Saki

Saki Kamisato (上里 沙希, Kamisato Saki) is one of the supporting characters of Seishun Buta Yarou wa Bunny Girl Senpai no Yume Wo Minai series. She is the girlfriend of Yuuma Kunimi.

Saki's primary concern is her popularity at school; Saki assumed Sakuta's status as a loner would lower Yuuma's reputation and hers as well.

In later episodes, it's revealed that she has a sister that she's often compared to by her parents, causing Saki to develop low self-esteem because of it. Sakuta realized this is why she is very protective of Kunimi's image and her own because her self-image in her eyes is already fragile.

[Spoiler] Throughout the story, she regularly stated that Sakuta should stay away from her boyfriend, explaining that Sakuta's involvement with the Hospitalization Incident would tarnish Yuuma's popularity and thus her own as well. At every turn, Sakuta replied to her demands comedically, causing her to give up on it. [/Spoiler]

(Source: Seishun Buta Yarou Wiki)