Sound of the Sky

Season 1, Episode 10: A Departure: The First Snow

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Kanata asks Kureha to tell her more about Princess Iliya. Yumina asks Kanata and Rio to check up on an old woman named Jacott who lives in the mountains. The two later take a walk where Rio talks to Kanata about her half-sister. As the snow falls, Yacott, filled with memories about her love, runs off into the snow and never returns. Rio reveals she is the half-sister of Iliya, and decides to leave the fortress to help improve relations between the warring sides, leaving Kanata her trumpet.