I want ask about her
http://i64.servimg.com/u/f64/12/14/64/99/alexia10.jpg

does anyone know who is she ?

There's not a lot of detail to go on there, the best I can do is take a guess. could be a number of characters like Toosaka Rin from Fate/Stay Night (I think the name is right), Shana, or Minatsuki Saya from Black Cat.

I'm going to eliminate Shana from the list, because that doesn't look like a Noizi Ito design to me.

That really does look like a character from Black Cat. That's my best bet.

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