One day, Cille Lund existed. She was pretty good at existing, as she was capable of all basic functions at acceptable levels. Then, early in her life, she decided to reach out to something more specialized, art.
The moment she sought to show her work to others of a higher caliber, an act that takes some courage (especially for art in particular), the reaction was swift and far too disproportionate. Without truly knowing why, society crushed her and tossed her aside with a force few others have witnessed, then crushed her familial bonds to make a point: she can't trust people. She resisted for a while, but she was quickly overwhelmed.
Trapped, hopeless, and alone, Cille waited for death. The personality of someone that believes themselves to be dead yet unable to finish the job is twisted and deceptive. She wasn't quite pretending to be someone else at all, rather, she simply acted in the most safe manner she could. Drawing the attention of society was no good, that would just result in more pain. Yet, despite hating the world, deep down inside, she knew she couldn't bring herself to do awful things to it either. Of course, it's not like she had the means to do so easily anyway, at least not without triggering her anti-suicide reflex or drawing society's attention (still a bad idea)! And even despite the lesson she had learned earlier, with nothing more to lose, she could freely trust people with certain information…of course, anything about her own mental state was off-limits to even be considered, and since she was good at acting, no one would bother to ask. The perfect defense against people that would try tearing apart at her very core, just give them unimportant information to satisfy them! Whether or not they were actually after it, Cille's actions were the same anytime she was pressed.
But then a lot of things changed, all at once. The military had come to take her away to a new place, that she had believed would be her grave, one that she could actually bring herself to get inside. Needless to say, this doesn't go as planned. Her newfound power served to mess with her even further, and her newfound friends straddled very uncomfortable lines. Even though Cille was sure that they were all well-meaning eventually, and they wouldn't hurt her intentionally…there was still room for doubt. If they didn't want hurt her intentionally, they could very well still hurt her unintentionally. And sure enough, this happens later! The very fabric of the universe seemed to be gunning for her.
…Perhaps some more after the epilogue.