ok, so, the mayor killed Audrey because he wanted his daughter to get out and not have to deal w her anymore. Sabrina killed Chloe because Chloe was a b1tch to her. Mark killed Rose because he didn't really care about her and the motive for that round is you could take 1 person with you if you graduated, however Juleka got very angry and distraught at the fact Mark killed her gf, so she killed him in rage. Nathaniel killed himself because his bf died. Mr. Agrest killed Felix because of Felix using his son. Lila is the traitor cause that's cannon. Hawkmoth is obviously the mastermind, but the twist is he survived the punishment. finally, Natalie is the headmistress because no one suspects her and she's nice