I think i'm left with three options for the christmas (non specified theme) fancy dress party; Hermione Granger, the host of the party, or someone from the navy.
I have all the stuff, and looks for Hermione.
I dress completely diferently to the host (a male), although we wear similar thing, they're put together in compeltely diferent ways, so I just wear things that I wouldn't, but he would wear together, aswell as getting a wig to wear.
My mum suggested wearing my cadet working rig, and replacing my shoulder slides and beret badge to something more like the real navy.