Just-For-Fun: SnS II - WTF IS THIZ?

[not so much of a spoiler, I tell ya. But if any information is found about this green-haired character then it's gonna be a spoiler straight away.]

... Just a jab I decided to take on the second season of the series.

The animation crew really want me to smack them for this. If they do plan on introducing this character in a FUURTTHHERRR point in the 2nd season of Shakugan no Shana, then hide her. This unknown character tingled my curiousity senses to da' max and it's annoying me!

The picture says what I want to say, actually. WHO IS THIS CHARACTER???

For your guys' information, this character appeared on the Season II trailers and the opening of the anime's second season. Saw her on the videos, and was like; "EGADS! WHO THE F&^* IS THIS GIRL!?"

I might have a clue here, I just want to see what you guys think.

Hence the name, I am too lazy to finish this off... >_>;;

P/S: The green-haired character was a VECTOR TRACE from the original anime screenshot, lulz sorry for not telling! (I can do it on my own but to save time I had to do it. XP anyways this is just so that anyone answers the question or have the same question as I do. }8D)