Rusty is quite a curious and adventurous kittypet. He leaves his twoleg home to go join ThunderClan. He proved his bravery earning him the name Firepaw. He is also kind and brave, with such a strong sense for justice. He is mainly driven by his curiousness and his courage. As the prophesized cat he has a destiny that will change ThunderClan and the whole forest forever. 

NOTE: I know Rusty/Firepaw starts off as a teenager, and he will grow older through course of the series. You must please be able to demonstrate a younger and a more mature voice, as the series progresses.