She's an demon from the hidden oni village in the unknown arctic environments who came to the human world in search of her mother who went missing during her childhood. She met Hiiragi Yatsuse during the end of summer at a bus stop and told him that she needed his help to find her missing mother in his human world in order to stop the snow beasts from destroying her village. She is more open-minded and free-spirited than Hiiragi and snowflakes come out of people whenever they can't keep their emotions inside.