Magic Knight Rayearth
refers to a pair of two rabbit-like creatures created by Yūko and Clow Reed in preparation for the events in "" and "xxxHolic". The travels with 's group, while the black Mokona stays in Yūko's shop. Both are based upon the original Mokona of "Magic Knight Rayearth", whom Yūko and Clow encountered while Mokona was traveling through different worlds. Mokona provided Yūko and Clow with the knowledge of alternate dimensions.