Hot princess peach. Mario Hoops 3-on-3 WarioWare:
Peach or Daisy's descriptions sometimes mentions each other.
Mario Party 4 Mini-game List.
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Fun with Numbers Mario's Early Years!
The two people have similar behavior and abilities, but unique attitude and different powers, reasoning why Daisy is an echo fighter of Peach.
Mario Hoops 3-on-3 WarioWare:
Mario heard Bowser's voice that said nobody is in the castle.