These next two weeks prompts are going to deal with finding more depth in your characters. You can sit for hours making the background and taste for them but, if they still fall flat, try word association. Don't believe me?
Have each of your main characters come up with immediate responses to the following:
What do your characters say about each one? How do your characters differ from each other? Is there anything in there that surprises you?
***You can also just look up word association tests online if you want different words.***
This will help you (hopefully) get used to thinking as the characters you write if not reveal anything to you about their personality. But I hope it does both. Tell me how it does (or doesn't) work.