Yellowfang is a dark gray she-cat with orange eyes, a broad, flattened face, and long, matted fur. Yellowfang was a ThunderClan medicine cat under Bluestar's leadership in the forest territories. Previously, she had served as both a warrior and medicine cat under Cedarstar's leadership in ShadowClan, and then just as a medicine cat under both Raggedstar and Brokenstar. She was born Yellowkit to Brackenfoot and Brightflower, alongside her littermates, Rowankit and Nutkit. She was later apprenticed to Deerleap, as Yellowpaw and soon earnt her warrior name, Yellowfang. Growing up she had an ability that allowed her to feel other cats' pain and this combined with a natural inclination to herbs attracted the attention of ShadowClan's then medicine cat, Sagewhisker. While completing her training, she became mates with Raggedpelt and bore him one surviving kit, Brokenkit. She gave up her son and continued in her position as ShadowClan's medicine cat. Yellowfang later became the mentor to Runningnose and watched her son become leader following his father's death. Brokenstar later exiles her from the Clan after blaming her for the death of two ShadowClan kits. Following her exile, she meets Firepaw and is taken as ThunderClan's prisoner. However, after the death of their medicine cat, Spottedleaf, she decides to remain with them and takes up the position. She later took on Cinderpaw as her apprentice, following the young cat's accident rendering her unable to complete her warrior training. Yellowfang later blinds Brokenstar, following his attempt at attacking ThunderClan's camp and has her Clan take him as their prisoner. However, when he helped plot an attack on ThunderClan, Yellowfang killed him by feeding him deathberries. Later on, a fire ravaged through ThunderClan's camp, Yellowfang died from breathing in too much smoke and ascended to StarClan. From StarClan, she gave Firestar one of his nine lives and advised future ThunderClan medicine cats with numerous prophecies. During the Great Battle she kills Brokenstar a second time. Yellowfang trains Puddleshine as a medicine cat and is present when both Leafpool and Squirrelflight are judged by StarClan.