I saw
Yuffie from Final Fantasy when I saw you. So cute! =D
Or
Margie from Xenogears (props if you know who I'm talking about!!)
But if you're not into Final Fantasy, maybe look into the anime Slayers.
Princess Amelia would suit you well too.
The most important thing though, is have fun. Choose a character that YOU like, not just because you look like them. I used to cosplay misa Amane, because I looked like her. But I hated the costume and the attention it got me (one word, CREEPERS). Now I stick to ginjika.