Just stay off the bus and you will become a Ranger.  That's what happened to Cassie.  She got worried when T.J. went to investigate something weird?   She couldn't bear to get on the tour bus and leave him.  I really don't have much to say about her.  She's a singer, a fighter, she falls in love with ghosts.   She fell in love with the Phantom Ranger.  I wonder how he really felt about her??