Princess Shroob

Princess Shroob is the main antagonist for the majority of "Mario & Luigi: Partners in Time." Hence her name, Princess Shroob is the second-in-command of an alien race, the Shroobs, though initially, it appears that she is their leader, although her sister Elder Princess Shroob really is. After being frozen inside Bowser's castle, she somehow manages to break free, and narrowly escapes Bowser's castle. As she makes her way back to the Mushroom Kingdom to conquer it, she runs into you. And, you can be whoever you want.