Ozni is a sick classmate and friend of Leah's. Due to his sickness he is barely able to speak but when he does it is some of the most impactful parts of the game. He is able to hum some parts but besides is very few lines he doesn't speak. Though for the parts he does speak he needs a sickly sounding voice, it should almost sound monster like. 

(Due to the fact that his few lines do spoil many parts of the game we will only add 1 random-ish line for him here.)