does someone know what anime the girl described belongs to?

I need help finding the anime the chick in a picture I came across is in. she's got long red hair in a ponytail and she's got a sword. the sword is glowing red and there's nghề viết văn on it closest to the handle. I'm on my iPod so it won't let me post up a picture. and it's not Shana. any help will be greatly appreciated!
:-)