Need Help With London MCM Expo Outfit

My girlfriend has convinced me to go to this expo in London and i have no idea what to wear so im looking for some advice. Whatever i go as, i am def wearing this (as it was expensive and im not going to waste money buying something else when this is perfectly fine. and comfy. and warm):

http://garbtheworld.com/images/psd/g0026105b.jpg

Apart from its all black. What im needing help with is what anime character wears a robe like this? My friend said a necromancer would be a cool thing to go as but i dont know any anime necromancers lol. So i would appreciate any help finding a character to go as so i can buy some more accessories to go with my robe.

i see no picture

Reminds me of Alucard (read backwards) for some reason...

Try Alucard from Hellsing.

Well, with that, and the rest black, you could be ed from fma. He has long red-ish trenchcoat and the rest black - black trousers, vest and jacket - oh and white gloves. You might have to put a black design on the back of the thing though - could do it with electrician's tape maybe?

Nah, but it's too far from Alucard though. First of all, he doesn't wait a hood o.O
To me, it reminds my of Avatar x.x' The color mostly. And, you could cosplay as Aang, and wear that robe with you.

Hurr, I'm not sure. I'm really tempted to say "Hogwarts Students" but that's a bit unhelpful if you don't like Harry Potter XD I only seem to know girls that wear robes. What colour is Negi Springfield's cloak in Mahou Sensei Negima? *thinks*