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is a Japanese manga series created by Clamp, a mangaka team made up by Satsuki Igarashi, Ageha Ohkawa, Tsubaki Nekoi and Mokona. Rayearth combines elements from the magical girl and mecha anime genres with parallel world fantasy.

The manga was adapted into 2 anime series in 1994 and an OVA in 1997.

In the first story arc, the current Pillar, Princess Emeraude, has been captured by her high priest, Zagato. The three girls are charged with the task of saving the Princess by activating the three . They are given a bizarre creature named Mokona to guide them on their journey. After the girls find and destroy Zagato, they finally reach Emeraude, but they learn that she had fallen in love with Zagato, hindering her ability to pray solely for Cephiro's well-being, Zagato had attempted to solve the problem on his own terms by stealing and imprisoning Emeraude, but feeling responsible for her actions, she summoned the Magic Knights to kill her since no one on Cephiro could harm the Pillar. Her dark side then took over, seeking to destroy the Magic Knights for killing her love. After a short defensive fight against Emeraude, the Magic Knights had no choice but to kill her.

The second story arc deals with the complications caused by the first season's climax: three warring planets, Autozam, Fahren, and Chizeta, have begun their attempts to conquer Cephiro and a new Pillar must be chosen before the whole planet is destroyed. Hikaru, Umi, and Fuu are once again summoned to Cephiro. It is later discovered that the mysterious Mokona is responsible for their being summoned back to Cephiro as he is the creator of both the Earth, Cephiro, and the three warring planets.

Umi Ryuuzaki has not been a contender in any CBUB matches.