Could Kanade Tachibana be the reincarnation of Yuzuru's little sister, Hatsune Otonashi?
I'm curious about this because I watched the series again and thought about how Kanade reminded me of Hatsune. I think this because I noticed odd similarities between the two characters. One was that both their first names refer to sound. Another was how Kanade thanked Yuzuru in the end which reminded me much of how Hatsune thanked him. I would be disappointed if this is to be true because then I just ruined the whole surprise for myself.