It's troublesome if the villain doesn't show their evil. Villains are necessary to make knights into heroes.Good & EvilHelbram in The Seven Deadly Sins
Everyone has to die someday. But what they believed in will never fade away as long as someone protects it. Once you've resolved to take on those principles, no matter how much blood and tears you shed, you follow through with it! That's what it means to be a knight.Meliodas in The Seven Deadly Sins
Because he's the hero Gotham deserves, but not the one it needs right now.
So we'll hunt him. Because he can take it.
Because he's not our hero, he's a silent guardian, a watchful protector, a dark knight.