Keiga

Keiga, the Tide Star, was the great ryuu (divine dragon) of Kamigawa's islands. She guarded Minamo and the Kamitaki Falls. Keiga was killed by the o-bakemono Hidetsugu while defending the Minamo School.

At some point before the Kami War, she accidentally met Kiki-Jiki and entrusted him with the mission of recovering her egg, stolen by Meloku. After this, the dragon helped the akki to unlock his inner magic talents.