There is just the slightest chance ever that I am using Lily's character as a vehicle for my own post-brain-injury issues. Maybe. A little.
What sucks is that you can seem normal most of the time. Yourself, just a little spacier. The fact that people on the outside of you don't always grasp is that normalcy takes a toll, and sometimes, if your requisite cocktail of rest-food-caffeine-and-stress-avoidance isn't met, your brain slips into the wacky.
What? Transparent, you say? Incredibly obvious, is it? Well, so's your face.