Do you have a Body Shop? Get her some soaps and lotions and stuff like that, [censored]es love that yo
Like, a bracelet or necklace or something. If not that, perfume or like, a doll of her favorite anime character. Or maybe even a perfumed doll of her favorite anime character wearing a bracelet and / or necklace. :shrug:
Can't go wrong with money.
Money, smelly stuff and jewelery are all easy outs. And the recipient knows it. If you know her and actually know stuff she likes (like gaming and anime) it's a total cop out to buy these things and shows a distinct lack of thought.

I don't know, females I know swear by that kind of stuff. They get all smell pretty and what not. Of course, for all I know, they're just tramping about town. Or smelling good for their boyfriends. Whatever.
Yeah, your average girl probably does. But if she's a cute quirky anime loving gamer, there are so MANY other possibilities that smellies are a waste.
List of items for purchase:
http://www.hottopic.com/hottopic/Apparel/TShirts/Adventure-Time-Gunter-Girls-TShirt-187870.jsp
http://www.thinkgeek.com/interests/giftsforher/e684/
http://www.thinkgeek.com/interests/giftsforher/b3e7/
http://www.thinkgeek.com/interests/giftsforher/afa6/
http://www.thinkgeek.com/interests/giftsforher/d14c/
http://www.thinkgeek.com/interests/japanfan/c4a6/
http://www.thinkgeek.com/interests/japanfan/e65c/
http://www.amazon.com/Manga-Beginner-Everything-Start-Drawing/dp/0823030830/ref=sr_1_1?ie=UTF8&qid=1307130574&sr=8-1
But if you can be more specific about what games and anime she's into I'll look more for you. Obviously all these things are bought online but quite a few can be bought in stores too.
If you care about her, buy her something that shows you listen to what she's saying.