This is very consistent with my idea of Peter -- fundamentally upright, uncomfortable with compromise, and compelled to act in defense of what's right. As a military leader he would have to learn to think strategically, though, so that would be an interesting journey for him, to learn to lead and inspire, but also to make the kind of choices that military leaders have to make, which often involve dishonesty or sacrifice, or deciding among several imperfect options.
Problem of Peter
It's very poignant that he sees himself as dull.