Question about a secret character (spoilers. dur.)

[Water ☮]

Seeing how i have no idea how to unlock Rosalina besides the galaxy data and I don't have Mario Galaxy I don't have Rosalina. My question is does she have some kinda special power that no other racer has!? every time I play a Rosalina online and I throw a red shell at her she just throws it back and it does nothing to her! is it because of the Luma?

[Gwen Khan]

she has no special powers that I noticed, I think the Luma is just for show

[JrDude]

Bad luck?
I mained Rosalina for a little bit, but the Luma never protected me >:(

[SkyMyl]

No. She doesn't have a special power, the Luma is just for decor, letting out squeals when you do something good (Trick, for example.).

Online, it was probably a coincidence or bad luck.