Working with Unexpected Character Questions: Finding Your Character's (or Narrator's) Inner Story

My summer writing goal is to bring one of my favorite characters to vividness on the pages of my novel-in-progress.  I've gotten good feedback about her, but she has a ways to go.  I haven't been listening to her as much as I ought, and it's showing in her scenes.  Some are sluggish, repetitive, and she's hiding much of her inner story from me still.

So…