Sora

Sora or Sky is a wild crow Misuzu Kamio befriended a pet before she met Yukito Kunisaki on the same day. Sora mostly appeared as a minor character throughout most of the series while making important appearances, such as discovering Yukito's missing puppet or pulling Misuzu's toy dinosaur to the shrine. Sora's true nature is revealed at the very end of the series, that he is the reincarnation of Yukito Kunisaki.