Since Mario Tennis Aces was my first Mario Tennis since the Gamecube days, this was the first time I played as the galactic princess in the tennis game.
She doesn't move more or less different than most of the roster.
But she's a "tricky" character so her tennis swings have much more curve to them than the rest. I did notice that Boo's swings were even harder to predict as a tricky character.
I won most of my matches with her, so she's certainly a favorite of mine.