I have a few guesses for this Unknown, but the best guess I can come up with is Nana.
But then again, she could be someone from a game. I mean, with those shoulder armors? She may be a warrior of some sort that I don’t know about.
So I’ll leave the decision up to you good people. Any takers?
Thanks to Rainer and Hesper for saying this is Toshiya from the Jrock band "Dir En Grey". Thanks also to Mun-yeen and daachan for confirming this!