This is my parenting/teaching style. We generally avoid yelling and encourage discussion. I want my kids to understand why we do the things we do & how we arrive at those conclusions. When my kids better understand the why, they better own the idea...it isn't just following a rule because they otherwise might get in trouble- it's following a rule because it's the best choice.
I don't have an ANTAGONIST as such (I guess in my story, the protagonists are also their own antagonists after a fashion), but if we say for the point of argument the protagonist is John and the antagonist is William... hmmm.... John: "You know that weird girl who keeps reading our letters?" William: "The one who keeps on calling us by our first names? What about her?" John: "I think she's got a crush on me." William: "Get away."