Originally Posted by Aquillion
Chewie could also be Sally making a character using advice from Pete. It makes sense -- she invented Chewie and his race, so she's the most likely one to remember him; and she's followed Pete's advice on things before.
That's why I think it would be funny if Chewie was one of Sally's friends. She told them all about this cool awesome alien she created, and they want to play one in her brother's cool game, picking abilities at random and ending up with a horribly broken combat god that puts Pete to shame.