According to Aristotle, there are four essentials of characterization:
- Characters must be credible.
Characters must be credible as human beings. In others words, readers have to believe a human being, in real life, would do what a character is doing. In real life, people have strengths and weaknesses. They love and hate. They like certain things and dislike others. Characters needs to be able to evoke emotion in readers, and in order to do that they need to be like us.
- Characters must be believable.
Characters must be believable as characters. For instance, character A needs to believable as character A, not B, not C, but A. If readers believe that the action a character commits would be done in real life, but not by that character, then you have a problem. Put differently, characters must be appropriate to themselves. A king and a peasant are two very different statuses, and so they’ll act differently from one and another.
- Characters must be consistent.
Characters must be consistent to how you make them. Or, if a character breaks consistency, then it’s a purposeful break and is big news. However, for the most part, characters need to be true to their natures. Their actions are rational, not giant leaps of irrationality. No sudden character changes. I recently read a novel where halfway through I had to stop and wonder what happened because suddenly a few of the characters were completely different. And it was a very sudden transition – one page they were one person and the next page they were completely different.
- Characters must be good.
This doesn’t mean that a character can’t have flaws. It’s good for a character to be flawed. Without flaws characters aren’t believable, and perfect characters aren’t usually all that popular. What is meant by “good” is that a character has some capacity for good. If the character is bad or evil, there’s a possibility for redemption – that’s what makes villains so tragic. They have the chance to be good, but they chose to go against that path, whether consciously or not.
And if the character is good, such as the heroine or hero of the story, they can’t be all good. Wickedness is mixed with goodness. People in real life aren’t one hundred percent good or bad. Characters shouldn’t be either.
The best characters are those who are caught in the middle, who struggle between right and wrong, good and evil. They’re the most realistic and the most interesting.