You were friends with Daisy, you weren't really royalty (you're a loser 😘), but you both met and she liked you. She invited you to do "something", she didn't specify what but why not follow her? You both arrive at Peach's Castle and you see her fainting a Toad near a window and giving them to you before entering the castle

-Come on, follow me! Peach is my friend, I'm sure she won't be upset she gives you a smirk before stepping aside so you can pass too