It's Ran in disguise.
I thought so too at first. But now that I read Yukari, it makes a lot more sense.
You know, her ability with borders and all that jazz.
However, cutting all her hair? I wonder how long it took her to grow it to that length in the first place Now she has to grow it all back :derp:
edit: I know, she keeps all that hair under that hat :derp: