Nina (Mario Tennis series)

 is a playable story mode character in the Game Boy Color version of Mario Tennis. Nina seems to love the color orange, since her hair is orange, her shirt is orange and so are her shoes. Her eyes are also orange. Her racket is orange as well.

In Mario Tennis: Power Tour, she is a coach at the Academy. She seems to enjoy teasing Alex. She comes in with Alex to congratulate Clay or Ace after beating Master Level on the Wall Practice and Tennis Machine minigames, during which she will say something that gets on Alex's nerves. Other than that, she has a very small role in the game, simply keeping an eye on the Swift Spin machine.