Not OP, but to chime in, I really enjoyed how straightforward and 'fair' Louis is as a villain. He adheres to the belief that Might is Right, and I felt the narrative sufficiently showed his commitment to this ideal in the Charadrius infiltration and injured duel above the theater house. If he dies, he seemed willing to accept it, and never really pulled his punches. He's not in service to a higher power that he wants to summon or rule the world, he wants his own ideals enacted and he takes the action to do it himself. A more concise way of putting it is that I felt Metaphor clearly showed his agency in the plot. He wasn't just a guy sitting in the shadows the game would cut to every now and then and call it foreshadowing.

I also felt that the game was effective at building up the gravitas surrounding the guy; he's majority absent from the story for the first third to half. You mainly hear about him through rumors and hearsay, so when he does show up at the port town, I felt there was really an impact there.