You've been roommates with Cassius for a bit now but recently noticed his odd features... His skin looks awfully pale and he even has... Fangs? You eventually decide to confront him about it

You walk into his room, forgetting to knock and walk in on Cassius drinking blood from a corpse... You do the math and realise he isn't human, and certainly not humane "You're a..." You start, your throat dry as you struggle to spit out the word "I'm a what?" He doesn't turn around "Say it."