Rio Rollins Tachibana

Rio Rollins Tachibana (リオ・ロリンズ・タチバナ, Rio Rorinzu Tachibana) is the main character and the offical mascot character of Tecmo's Super Black Jack gambling game series. She made her first debut outside of Japan in the Dead or Alive Xtreme spin-off, Dead or Alive Paradise.
In Paradise, the player can partake in poker and blackjack in the casino during the evening, both in which Rio acts as the table dealer. She also appears as a character to interact with in areas outside the casino.
Rio can be unlocked as a playable character by receiving Zack's "challenge item" in the hotel, visiting the casino to play blackjack against Rio, and winning with one blackjack hand.