Hi there In the story I am writing, there is a twist that reveals a side character to be the main bad guy. Before that point, he is like a bumbling, gentle uncle. I should say that his motivation is admirable, he genuinely believes he is doing the right thing, and that the ends justifies the means. How can I make him a credible threat, but also a credible character? I mean, he has to be a very real problem for the protagonist, but at the same time, I don't want it to feel forced, as if he could simply be talked out of his position.