Briarlight/Main article

Briarlight is a sleek-furred dark brown she-cat with sky-blue eyes. Her lower spine is broken, and she has inoperable rear legs.

She is born as Briarkit  to Millie and Graystripe, along with Blossomkit and Bumblekit. She becomes apprenticed as Briarpaw, under the mentorship of Thornclaw. When a beech tree uproots in ThunderClan's camp, Briarpaw attempts to save Longtail, but the tree crushes both of them, killing Longtail and breaking Briarpaw's spine. However, she earns her warrior name, Briarlight, along with her siblings, Blossomfall and Bumblestripe.

Unable to perform her warrior duties, Briarlight stays in the medicine den, acting as an assistant. Jayfeather works with her on exercises to keep her body moving and her chest clear, and they form a deep friendship. When a belly sickness breaks out in ThunderClan, Briarlight succumbs to it, much to the medicine cats' dismay. She passes away with her family and loved ones around her.