See, though, your frame doesn't actually follow the Rule of Thirds. For it to work, the character's CENTER should be bisected by the first vertical line, not be entirely positioned in the left third of the frame.
Take for example this picture of a puppy:

The puppy isn't in the right third of the frame, it's located in the dividing line between the middle third and right third. This generally is more pleasing to the eye. Now, if you wanted to achieve a feeling of unease, breaking the Rule of Thirds is a great way to do this.
If you want your frame to be more pleasing and put the viewer at ease, I'd move your character just one stud over to the right.
Also, keep in mind all creative/artistic "rules" can be broken, but only should be broken once you have a purpose for breaking them, and you actually understand why it was "rule" in the first place.