Of course rinoa's not a SeeD; she's never been trained in the least. That's why she' snot allowed to help in the sorceress assassination and that's why she gets all morose at trabia garden. She doesn't know the salute (does irvine even? I don't remember; tell us if you get there avara), she remarks how ready for battle everyone else besides her is, she feels left behind because she's not like them.