There are more unused sprites than the ones mentioned in this particular post, you can find the rest at: /post/184532747414/ (Remilia Scarlet), /post/185597819729/ (Yuyuko Saigyouji), /post/184527069094/ (Ran Yakumo), /post/185661312904/ (Keine Kamishirasawa), /post/182404692694/ (Mamizou Futatsuiwa), /post/175959170639/ (Wakasagihime) and /post/157014063859/ (Yatsuhashi Tsukumo).
Kyouko likes to make origami crows for Jonathan -- each crow is has a handwritten message on the inside but Jonathan doesn't want to take apart the paper sculpture so he has no idea. He does however, save them in a shoe box alongside the gifts his actual crows give him