" The Ice Wizard had a younger sister who loved him more than anything in the world. One day they fought over something foolish. He lost his temper and told her to leave him alone forever. She ran down to the sea in tears. There she found a flock of swan maidens. They gave her a white feathered dress. She put on the dress and became a swan maiden herself. She flew "

― Mary Pope Osborne , Winter of the Ice Wizard (Merlin Missions #4)