Not only does her malevolence come through clear as day a bell, but I also see a lot of conflict and pain in her expression; it extends into the extreme tension racking her body, at least that's what the pose looks like to me. You highlighted her darkness wonderfully with your placement of her M&T plus the lighter background elements.
I think he meant "this" as in, "I agree with the sentiment of the person to whom I am replying." It's an Internet thing that has become quite popular, if not somewhat annoying. Whatever gets the point across, I suppose.