Brightheart is a young warrior of ThunderClan. She is the twin sister of Thornclaw, and the younger brother of Brackenfur. She is also trained a little bit in the arts of medicine to assist Jayfeather in times of war. She is Cloudtail's mate, and the mother-in-law of Birchfall, mother of Whitewing and grandmother of Ivyaw and Dovepaw. She is Firestar's niece-in-law, and the aunt-in-law of Berrynose, aunt of Poppyfrost and Cinderheart, and great-aunt of Berrynose and Poppyfrost's new kits. She is mainly white, but has ginger blotches and a ginger tail. She has one amber eye and a shredded ear, as a result of a dog attack. She is also the sister-in-law of Sorreltail and is described as being kind.