And We Will Burn

Among us are those who are only half human — metamorphs. Those considered "fortunate" are sent to academies to prepare for life in society, but not everyone is ready to accept such a fate.
Naomi had long hidden from the capture service. Life on the street taught her to fight, and so on the very first day of classes, she clashed with a classmate.
And the next morning, he was found dead.
So who among those living in the academy is a human, and who is a beast? And can a beast be one who has never changed hands for wings and paws, and smooth skin — for feathers and fur?