All right, I know I've posted something similar to this, but now I'm hung up on something else. I'm writing two stories at once because they're following nearly identical timelines, so it's just easier for me to keep things consistent this way. In one of the stories, the main character is a female, and she starts out as a very aggressive, dynamic person. In the second one, the first main character is also a female (later the title of main character will be shared with a male character), and she is reserved and very kind-hearted and polite. The problem is that the polite character is just plain flat. How can I make her a more interesting character while still keeping that shy, quiet personality?