Isurugi Chie

Chie is Shikanosuke's childhood friend. She plays the drums.
She is a year older than Shikanosuke, but for family reasons she had to repeat a grade. She is also the president of the Second Literature Club, which Shikanosuke and Sarina are part of. Possibly because of what she has went through, Chie is mature, thoughtful, and acts as the voice of reason for the band. However, she also keeps a tight leash on herself, disguising her laidback and timid nature.

From Mangagamer