The BEST episodes written by Kubota Masashi
#1 - Gate Holder
Rio - Rainbow Gate! - Season 1 - Episode 2
Rio is asked to train a new recruit named Anya Helsing to be a dealer. Anya is quick to point out that Rio owns a "Gate", one of thirteen rare cards that are wagered in battles with other "Gate Holders" to determine the strongest dealer in the world. Although her dealer skills are quite good, she is rather clumsy, causing some chaos in the casino. Meanwhile, a Gate Holder named Elvis comes to challenge Rio to a Gate Battle set on a giant roulette table. Although Elvis has confidence is his prediction of numbers, he ultimately loses to Rio when a bandage he was wearing on his finger comes off while throwing the ball, allowing Rio to guess correctly and win his gate.
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#2 - Sky Resort
Rio - Rainbow Gate! - Season 1 - Episode 5
Howard sends Rio, Rina and Anya to work at the Sky Resort casino situated at the top of a mountain. Once there, they meet the resort's dealer, Linda, who gives them a tour of the facilities. She is soon revealed to be a robot, and the resort's main terminal. The resort opens the next day, floating itself and its customers high into the sky. Just then, a boy reprograms Linda to challenge Rio to a Gate Battle in which they must both race each other down a giant water slide. The match is a close call throughout, with Linda manipulating the course to catch up; however, Rio wins when Linda loses her head. After the boy relinquishes control of Linda, the mastermind, Cartia Goltschmitt, approaches Howard.
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#3 - Number Ten
Rio - Rainbow Gate! - Season 1 - Episode 11
Rio and her friends enter Goltschmidt Kingdom and start winning big in the various attractions in order to be able to buy back the resort. However, Mint's bear Choco goes missing, so Rio goes with her back to the casino to search for it. Meanwhile, Howard talks to the true Joker, Risa Rollins, who reveals she hid herself from the Casino Guild to protect Rio. The next day, everyone had lost their winnings thanks to a pair of twins named Yang-Yang and An-An who challenge Rio and friends to an explosive game of Concentration. With the score tied, Rio shares her aura with Mint, who is able to find the final pair and win the match. Just then, a wayward explosion hits Mint, but she is rescued by An-An, who is revealed to be Choco, who Yang-Yang had taken to make into a friend to play with. Rina then appears and Rio challenges her to a Gate Battle.
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#4 - Ace
Rio - Rainbow Gate! - Season 1 - Episode 8
In order to save Rina, Rio has to guess which hand King will have a coin in after he flips it, not made easy by Rio's fatigue and King's history as a con artist. However, Rio sees through his strategy of destroying the coin, and picks one a hand that's guaranteed to be empty. However, Rina disappears again. Meanwhile, Jack hacks into the systems using a videogame-like controller to try to take control of the flight system. Despite being told to rest, Rio goes to search for Rina, and is shocked to discover she is a Gate Holder working under Cartia, who is revealed to be her aunt. Rina claims to be seeking revenge against Rio's mother, Risa Rollins, for allegedly seducing her father and convincing him to leave her weak mother, who fell into a coma out of shock, revealing they are blood-related. A Gate Battle takes place in a game of poker, where Rina's superior Roll Ruler abilities win against Rio, who falls unconscious.
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