Cinderheart is a character from the Warriors book series by Erin Hunter. She is a ThunderClan warrior known for her loyalty and bravery. Cinderheart is the reincarnation of Cinderpelt, a former medicine cat, which gives her a unique connection to her past life. Throughout the series, Cinderheart struggles with her identity and the expectations placed on her as a warrior. She forms strong bonds with other characters, including Lionblaze, and plays a significant role in the events of her clan. Her journey highlights themes of destiny and self-discovery.