Princess Daisy is the princess of Sarasaland, which is made up of four kingdoms: Muda, Easton, Birabuto, and Chai. We were first introduced to her in Super Mario Land, where she was kidnapped by Tatanga, an alien, and was rescued by Mario.
For a long period of time after that, Daisy didn't appear in any game. Until some years later (that's some vacation), she appeared in Mario Tennis 64. After that, she started appearing in more and more games. You got to see what Daisy was really like in these games. She turned out to be a cheerful tomboy, which is a bit unusual for a princess, but that's why her fans love her.
Cheerful. Spunky. Skillful. That's Daisy for you. Daisy is usually considered a tomboy, but there's more to her than just that. She's a very energetic and competitive person (see all Mario Sports games :D). She's the type who won't give up without a fight. Daisy knows fun when it comes to sports, and enjoys spending time with her friends. Daisy is often called "cute" in official profiles, but don't be fooled by her looks. She'll swallow you up alive in the racetrack if you're ever in her way. Overall, Daisy can be described as tough, bright, lively, and full of energy kind of girl.
Other than being the tough cookie she is, Daisy isn't unfriendly; she loves to hang out with her friends and likes to make new ones as well.
Powerful yet elegent, like a flower. Whether it's kicking butt in minigames, getting to the finish line or scoring that last, crucial point, Daisy manages to still have some style. All of her "special attacks" had to do something with flowers (flowers, flower pedals, etc.). Those flower petals floating around look pretty awesome, don't you think? In Mario Strikers Charged we were shown a new ability of Daisy's: crystals. Daisy was able to summon huge crystals from the ground as a "super ability" in Mario Strikers Charged.
Even though Daisy may seem like a fragile girl, she's one of the strongest people in the Mario crew. In Mario Golf: Toadstool Tour, Daisy had the longest ratio hit than any other human player. While Daisy can be considered an all-around player, she leans more towards technique.