Deadly game with your classmates, now it's only the three of you

Ellie, yourself, and a quiet girl

Almost done to the game, your relief turns to dread when the announcer announced "There's still one killer"

Your heart sinks, and when you turn to face your friends, Ellie has stabbed the quiet girl. Shocked by the scene, Ellie turns her attention to you

"I'm surprised you thought I was innocent" she remarks coldly " I should thank you for defending me from being voted out, should I kill you?"