Crystalheart is a pure white she-cat with long, curly white fur and a silky, feather-like tail. Her eyes are a soft, rational baby blue eyes that often light up when she's excited. She is very defensive and protective of her heritage as a half-BloodClan cat, but she and her sister, Pearlblaze, are still respected and treated just the same as any other forest-born RiverClan cat.  Crystalheart's and Pearlblaze's deceased mother, Stripedtail, was a BloodClan cat. Their grandmother, Strike, parented Stripedtail and Spottedpelt, their living uncle, at the time Stripe and Spot. Their father, Wolf, was hit by a car five or six moons after their birth, leaving Stripedtail and her daughters to fend for themselves. Spottedpelt brought them to the Clans, where Stripedtail later died in a battle with WindClan.