Ritsu, or otherwise known as Ricchan, is the self-proclaimed president of the light music club and plays the drums. She says she chose to play the drums because they are "cool" but she then admits that she has trouble playing instruments which involve intricate finger movements, such as the bass, guitar and keyboard.

Ritsu is cheerful, often likes making jokes and is sarcastic most of the time. She has an ambiguous yet upbeat personality, much like Yui, but often has trouble remembering important club activities and announcements and gets constantly rebuked by Mio for forgetting to send in important forms concerning the club.

She is a childhood friend of Mio and will often take the opportunity to tease her whenever Mio is cowering from something. She also has a younger brother named Satoshi.

Source:Wikipedia