Can You Think of a Female Character Who Wears a Mask?

[kyanopsyche]

I'm trying to think of a costume idea for a halloween party I go to every year. I'm looking for a female character who wears a mask because I'm shy. I've already dressed up as Batgirl (the Barbara Gordon version) and Catwoman, and so I am now down to "random ninja" for ideas.

I guess I could try Shadowcat from X-Men, but I'd really rather attempt martial arts or parkour than act very outgoing. And I'm not sure I could make the new Batgirl costume look like it does in the pictures without suffocating.

I have not come across any female anime characters who wear masks. Have I missed some?

If anyone could think of something that would work, that would be really great.