Princess of Sarasaland, she is suspected by fans to be a relative of Princess Peach Toadstool and Luigi's girlfriend. The first name Daisy is often wrongly applied to Princess Toadstool, in part because Daisy replaced Toadstool as the princess to rescue in the Mario movie, which was made prior to the first name "Peach" being used in the United States for Princess Toadstool.
In most of the games, this tomboy princess can be recognized from Peach by the color of her hair: (Daisy has brown hair and Peach has blonde hair), although Peach has sometimes appeared with red hair. The colour of their dresses is also different, Daisy's being a yellow dress, when Peach's is Pink.
Daisy, like Waluigi, was not playable in the story mode of the game; however, she appeared after the player completed the first five regular/Duel boards.
Daisy's abilities are based around the fact she is one of the few "Technical" characters in the Mario series who actually has a large amount of physical strength.
Daisy tends to speak more in common contemporary vernacular than other characters; examples of this are when she says things in a slang tone of voice.