Upon Mario introducing her to Bowsette, who was Bowser after putting on a Super Crown and turning into a human-esque princess... She only had one response in mind.

Nope!

She proceeds to swipe Mario's hat off of his head and put it on herself, only t then change herself. She's definitely shorter, a little pudgier, and her hair shorter. She even wore a pink shirt, dark pink overalls, and a pink hat similar to Mario's, even with a small brown mustache, but she kept her long lashes and feminine voice even as she left while saying no over and over. You follow her as she speaks to you.

Fine! If Mario wants a new Princess instead of me, then... Then I'll save myself! Be my own Mario!