Musashi Miyamoto

One of the members of the Dark Samurai who just like Jubei also uses a dual katana as her fighting weapon though she is a sworn enemy of the master samuraisshe is also a frequent customer of their Buou Academy Maid Cafe and always wanted Jubei to be the one to serve her even though she calls the latter a Fake. It was later in ep. 5 that she found out that Jubei is also a master samurai. Source: ANN Forum