Ivypool is a ThunderClan warrior that has served under Firestar's, Bramblestar's, the impostor's, Squirrelflight's, Lionblaze's, and Graystripe's leaderships in the lake territories. Ivykit was born to Birchfall and Whitewing, along with her sister Dovekit. She was apprenticed to Cinderheart as Ivypaw. Because of her powers, Dovepaw received special attention from their some of their Clanmates, which made Ivypaw grow jealous. She was recruited by Hawkfrost to train in the Dark Forest to become a better warrior, but learned of their true intentions and became a spy for Jayfeather and Lionblaze. She received her warrior name, Ivypool, and became a warrior of the Dark Forest after killing Antpelt. During the Great Battle, Ivypool fought with the Clans and managed to convince multiple Dark Forest trainees to switch sides, but failed to convince Breezepelt who informed the Dark Forest leaders of Ivypool's betrayal. After, Ivypool took the oath of loyalty to the Clans along with the surviving trainees, and mended her relationship with Dovewing. She received her first apprentice, Snowbush, and later on received her second, Twigbranch, and the two formed a close bond. Ivypool became mates with Fernsong, and the two had three kits, Bristlekit, Thriftkit, and Flipkit. Ivypool was hesitant about staying in the nursery, so Fernsong volunteered in her place once the kits were weened. Ivypool maintained a close relationship with her kits, and was hesitant to stand up to the impostor out of fear of exile. After Bristlefrost's death, Ivypool heavily grieved but found comfort in Rootspring, her daughter's lover.