Kyouya Kisaragi  

, 如月 響也

Ritsu Kisaragi's younger brother is also his childhood friend, Kanade. Despite appearing rebellious and often finding tasks annoying, he always ends up looking after Kanade. Although he initially wanted to stop playing the violin whenever he pleased, when Kanade announced her plans to attend Seisou and invited him to join her in playing the instrument together, he agreed.