by Hayasashe is socially withdrawl from most of the world she lives in a well populated area but never goes outside for communication yet brags about being some fearless sociopath which is either narcissists magical thinking or the delusions of a schizophenic
Why not this? Seems plausible.
your sentence is incoherent so please make a new one
False bravado isn't as extreme as full blown delusions.
The hallucinations she admitted came from sleep deprivation and drugs in your example.
You'd be surprised how delusional non-schizos can be, and there are other disorders that carry it as a trait.
As for the rest of it (the knoifs, improper sleep, possibly even the "social withdrawal" and blank expression), the reasons sound more like they root from context as opposed to anything genetic.
We'd need far more proof, such as if the disorder runs in her family's genes and how she'd behave without certain things present in her life. Schizophrenia isn't as cut and dry a disorder to classify someone as since it's major symptoms appear later in life and can appear as other disorders in the right light. It's only around 1% of people over the age of 18 who even have it, so again, I'd say it's a reach.