I think the ideas above are good ones. I know how hard it is when a character you love starts to die in your head.
I think you could put her in some controversial positions, where she will have to stand up for what she believes in. Maybe she comes up against a humanist group or something. We are going to be starting a plot here soon, before school starts so that hopefully everyone has something to do.
Let me know if there's anything I can do. If you need some of my characters for plots, they're available! I even have a human for her to play with if she needs some friends!