Rusty

Rusty (later known as Fire Heart and leader of Thunderclan, Firestar) a house cat, runs into a ThunderClan apprentice, Graypaw, in his backyard. Rusty, however, does not run away, but fights back. Bluestar (Thunderclan leader) and Lionheart (Bluestar's deputy and Graypaw's mentor), having watched the confrontation, invite Rusty to join ThunderClan.