I'd use Henry's very generous character mesh, shrink it down and alter it to give it hair you're looking for. That's half the hard work done. Then texture it, which I'm crap at, animate it and done. Well, one step finished.
And because it get's on my nerves the whole little girl ghost thing is not just FEAR based. It's been a steeple in horror movies and games for years. The Shining (Stephen King)for one used little twin girls with creep monotone accent. The Ring? Yeah FEAR stole the hell out of the little girl ghost from The Ring. They even look the same. But those are just movies. Let's go with games shall we?
We have Silent Hill and their Little creepy girl ghost all burnt and everything, then we also have Fatal Frame for the PS2 and the rest of those series. Clive Barkers Undying as well. So don't take the piss just because someone has an idea that others have had in the past, the sheer fact of the matter is that there are no more Origonal plots left. How many of us have made zombie games? Who shouted Resident Evil or Left4Dead at you then? Leave the man alone.
Sorry for that rant but Plot Association kills the creative process and I'm really tired of seeing people make useless comments like that. Shooting someones idea down just because it resembles something from another game.