She appears to be a sixteen years old. She was a frall, far-skinned young lady with large, rounded pink eyes with white pupils shaped as flowers. She had black hair which was always tied into a large bun fastened with a hairpin and decorated with a Kushi (hair comb) and three snowflake hairpins, she wore a white haori, circle-patterned, pink kimono that faded into a snowflake pattern tied with an obi. Koyuki had a kind and gentle personality. But she died due to poison