The other 2 are obviously comical relief and so is nel for that matter but im guessing that in some important fight after ichigo gets his ass handed to him she's gonna do some sort of release of her true powers. Probably not with jearjackes since the fight between him anbd ichigo is gonna be so personal but maibe with ulquiorra. I just hope this doesnt turn out into one of those "she transforms and then dies to save him" bullshits , i like nel.