Crimson was a kittypet for the first few months of his life, before his house flooded in a hurricane, killing his brother and his mother. Only he and his sister survived. They traveled on, learning how to fight and hunt for themselves. But then, his sister, Copper, was attacked by an eagle and was blinded. Luckily, Crimson had picked up enough to keep them from getting infected. A few moons later, after Copper and he had transitioned into their NEW lifestyle, word got out about a group called 'BloodClan'. Crimson decided to go, even though Copper thought it was a bad idea. Crimson went anyways, and Copper wouldn't leave him, so she followed. When they requested to join, the BloodClan leader ordered someone to kill Copper because she was of no use to him and his group. She couldn't and fight or hunt, so all she was good for was breeding. And what kind of monster kits would the scarred she-cat produce? After watching his own sister murdered in cold blood, Crimson slit the throat of her killer and ran. He came upon the Clans and was driven out (not that we wanted to join them). He realized he'd killed Copper. He brought her there. He became coldhearted. Even though he'd avenged her death, he was not satisfied. That cat didn't have to kill her. He acted on orders. So he set out to kill the BloodClan leader. On his way, he was distracted by a group of rogues living in harmony, not anger and mistrust like the BloodClan cats. He was confused by them. Why did they not turn on them when they became hungry? They offered him a place in their ranks, and he realized he could start over. So he joined. :D
Sorry for the long story. ;)