Game of Thrones Party

The female you most closely resemble is Arya. You could use that as a starting point

First off, do you have a sewing machine or have access to a sewing machine? 

Second, what character would you like to dress as?

There are a lot of very easy patterns that you can use to make some really simple medieval/GoT garb. Fabric really shouldn't be that hard to find either. Once you have something basic designed then it's all about accessories. 

I've been involved with a medieval combat society for over a decade and I've been making my own garb, as well as the garb for my family, for that long. I've done it all, made the super simple and the very complex. Give me an idea of what you want to do and what you have available and then I'll do my best to help you out.

I have a sewing machine, thankfully (:
Most likely Asha Greyjoy, I would have dressed at Arya but due to the fact we're in the North I think Arya would be over done, and at 5'7" I'm pushing it haha
We have a sewing shop like 2 minutes from my work and they have tonnes of stuff so getting materials would be easy enough (:

So, what was the final solution?