Resembling both his father Chevis and oldest brother Slagar, red-furred Mucro spent most of his life in confusion and with divided loyalties. He abandoned his pack, Mt. Desri, at a young age and joined the Lupine Terrors under the rule of his brother.

After the death of his father, Mucro began to question the choices he had made, but he did not have the courage to abandon his brutal new pack. During the Raid, Mucro heroically changed sides in battle, sacrificing himself to save his brother's life. His memory is now honored by Mucro II, a son of Khalor.