Well if we go by official translations, it won't be until 2013 or so, won't it? Given that amount of time it'd be quite easy to be spoiled by images of the character before hand.
I take it this is the character that was hinted at in volume 9, as well as the missing member from the start of the series that they started to guess didn't exist?
However, internet translators somewhere will cover it long before then.
NWF: Yes, she is.
I was going to post full spoilers here, but I'll simply say that you shouldn't even Google her unless you absolutely want to know the story right now. You will be spoiled right away.