Bridesmaid
Sister, Best Friend from Birth
Groomsman
Best Friend, Bro Before (and after)
Bridesmaid
Big Sister, Role Model
Groomsman
Brother-in-Law, Matchmaker (he caught them a catch)
Bridesmaid
Cousin, Partner/Competitor in Every Life Event
Groomsman
Brother-in-Law, that's it.
Bridesmaid
Oldest Friend, LLFL
Bridesmaid
Friend (watch out for this one)
Ring Bearer
Nephew, Best Little Dude
Flower Girl
Niece, Tiny Clone of Her Mother