Suruga Kanbaru

Suruga, the main character of Suruga Monkey, is Koyomi's underclassman, ace of the school's basketball team and one of Hitagi's acquaintances from back in junior high school. Immediately after she entered senior high school, she became aware of Hitagi's secret and was threatened by her, just like Koyomi was. She's an admitted lesbian, fujoshi, lolicon and masochist.

Spoiler She also has been growing her hair longer since. Her next story was revealed to be Suruga Devil.