on Writers Helping Writers:

When it comes to generating conflict, your character’s personality can help ensure that sparks fly, especially when their traits clash with someone else’s.

When people grate on one another their interactions become filled with misunderstandings, power struggles, one-upmanship, and impatience. Whether allies, enemies, or something in between, contrasting viewpoints and attitudes sharpen dialogue, and if tempers flare too far, friction can become all-out conflict.

And guess what–we want these escalations to happen! They keep relationships from getting stale, add plot complications, and keep the pace moving. So bring on those clashes, problems, and fallout, I say. Let characters get under each other’s skin. When people get along, it sucks the tension out of your story faster than a three hundred year old vampire enjoying a human buffet.

There are many ways to create friction– characters could have opposing goals, be competing for the same thing, or have opposite ideas about the path forward. These setups can all work, but only if they don’t come off like a plot device. For readers to see friction as natural, not manufactured, it needs to come from within the characters. An easy way to do this is to let their opposing personalities do the work.