No, she's not really in an asylum, what you see is a fantasy... And maybe where this little freak belongs.
Meet Sophie, a girl from a fairly well off family, she isnt the victim of abuse or cruelty of any sort, but she has a weird, perverse obsession with the idea of bad things, and pain being afflicted upon her. She learned early on that she can't talk about her weird obsessions with people in general, otherwise things can get crazy pretty fast, but if you hear her start to breathe heavily, then its probably best to just ignore her, it'll pass.
Other than her weird nerotic masochism, her hobbies include studying the occult, browsing the web, and strangely enough, knitting. She tries to act as normal as she can in public, so you might even be fooled into thinking that there's nothing wrong with her.