Yuu Fua (不亞 幽)

Yuu Fua (also known as Yumama in the English dub version) is a character who first appeared in the Duel Masters Charge season of the Duel Masters Anime and Manga.

A girl who is Zakira's sister. Extreme Bucketman has a crush on her. Unlike Zakira, she is actually not evil and seeks to release the kids in his basement.

(Source: Duel Masters Wiki)