Defeat Rio with a blackjack (Ace plus any face card) to make her
available to partner with in the game. Her favorite color is hot pink,
and her preferred food is Ice Tea or Ginger Cookies. It takes a lot of
gifts to get her to like you enough to partner with, especially if you
are playing as Christie. Once you partner with Rio, Zack will give you a
gift that tells you about a special challenge. The special challenge is
to defeat Rio with another blackjack. After you do this, a message will
appear saying Rio is now a playable character.