Munday: The hero and the villain

Today, we invite you to tell us about the hero(s) and the villain(s) of your canon. If you prefer the terms protagonist and antagonist, that works too. Specifically, we want you to tell us about how your protagonist and their primary enemy/opposition are similar and how they are different from each other.

What virtues do they both share? What flaws? Are they polar opposites in all things, or more alike than they want to admit? Is their relationship a straightforward one of hatred, or is tangled up with friendship or love or a past connection? What do they mean to each other? Why are they working at cross-purposes?