Kanade Kohinata[]
He often tells her she lacks the inner flower and even after Seiso won he thinks she is mediocre.
Ritsu Kisaragi[]
Two years ago Chiaki and Ritsu were the competing finalists in the solo division at a national competition. Ritsu won the event, but there was a judge who gave Chiaki's performance a score of zero. It was Chiaki's father. Chiaki wants his father to approve his music in a rematch against Ritsu.
Kahoko Hino[]
Chiaki meet Kahoko during his days as elementary schooler. There was a festival in Seisou Academy, and Chiaki visit the school and challenge students of Seisou Academy's Music Department after he and Housei got seperated from their friend. Then, he meet Kahoko Hino who also got seperated from her friends there.