The Last Human

You use your "ultimate instinct" (lol) to save churou, you then go to a empty classroom with A-Fei but churou decides to follow you.
While you were discussing about something, you see churou's follower got a mediocre cut/bite on his arm. You then decide if you should kill him or not.
You also notice the vice principal crashing his car and dying.
But what will you do to the follower?