Graystripe is a dark gray tom with yellow eyes, and a stripe of darker gray fur running down his back.

Graystripe was a Thunderclan elder under Bramblestar's, the imposter's, and Squirrelflight's leaderships in the lake territories, and previously served as a warrior under Bluestar, Crookedstar, Leopardstar, Firestar, and Bramblestar in the forest and lake territories. He was born to Willowpelt and was apprenticed as Graypaw to Lionheart, quickly befriending Firepaw, a former kittypet, the two forming a lifelong friendship. After becoming a warrior, Graystripe mentored Brackenfur. While out in the forest, he was rescued by Silverstream, a Riverclan warrior, after falling through the icy river. The two often met in secret afterwards, and eventually started a relationship. Silverstream had his two kits, Featherkit and Stormkit, but died from blood loss while kitting, which devastated Graystripe. He decided to join RiverClan to be with his kits, but defected back to ThunderClan following his exile. During the midst of the battle against Bloodclan, Graystripe was made deputy, and after Firestar went on a quest, Graystripe briefly led ThunderClan alongside Cinderpelt, where he made a vow to Gremlin and helped fend off another battle with Bloodclan.