Mistystar was born into ThunderClan. Her littermates are Mosskit and Stonefur. She was quickly given to RiverClan by Bluestar, her mother. She served RiverClan well, and soon became deputy. After Leopardstar died, she took her place in Fading Echoes. Before that, she had four kits. Reedwhisker, Graymist, and two unnamed. (Graymist is unknown to be her kit.) She chose Reedwhisker as her deputy.