4395
Nope, she's just plain old insane. Psychosis is a general mental condition causing people to loose contact with reality, with more exaggerated psychosis it can lead to confusion between fiction and reality for the patient, because of how broadly definable it is it includes many mental conditions such as bi-polarity or schizophrenia (the two being at relatively opposite ends of the spectrum, bi-polarity being minor psychosis (as it doesn't result in a great loss on reality rather affecting the mindset of the person greatly) whereas schizophrenia is major psychosis, causing the patient to believe that a fictional character in their head really exists.)
And before you ask, yes I knew that myself and yes I typed that myself.