Let me clarify: we’re not talking about “good” or “moral” characters—we’re talking about characters that readers will enjoy seeing on the page. Sometimes that means the character is good and virtuous, but other times a character can fell into the category of “likeable douchebag.”
I’ve complied a few tips and tricks to help fellow writers incorporate tension into their stories. In an ideal world, tension would flow from every corner of the narrative—everything from character interactions to the main plot. Tension is what keeps a reader invested, so obviously we’ve got to have it!