Don't know, I've only played Everquest once and it wasn't all that good to me. I don't think this would be in it, just due to the style of this. It might not be Dark Souls but if it is I'm thinking it's another one of the Chaos sisters.
Yea I really don't know, I'll see if I can find out though! It is pretty cool, and I'm really curious who made this sculpture.