Pyrexia mean rise in body temperature. Using your context clue from the word pyro you can guess that Pyr mean fire or heat related.
It will most likely be a blend, for example a Kotpies is the offspring of a Siamese cat and a Pug dog.
Believe it or not, depression. Depression will cause many symptoms, including a hostile behavior, impulse spending, and may result in drug use. Unless pre-diagnosed with a different type of mental handicap, it would be easy to infer that she might have done some type of drug as a result of her depression, thus causing her to run around in underwear and chant. I hope this helped !
