1. Luigi: This is the most common theory. Daisy and Luigi often appear together in various games, share a strong bond, and exhibit playful teasing.
2. Mario: Some fans see hints of a romantic connection between Daisy and Mario in certain games, but it's far less common a theory than the Luigi pairing.
3. Waluigi: This pairing is less popular but still has some fans who find their competitive dynamic interesting.
Ultimately, Daisy's romantic life is left open to interpretation. There's no official confirmation from Nintendo about her love interest, leaving room for fan speculation and creative interpretations.