MHA - Robber

Intro (Please, Holly is not my real name! Please stop asking. It's just my therian name.) Anyways, all of class 1A is stuck in a dark basement with no window, and Bakugo was told not to break down the door. Iida counts how many people are there and counts 21 (There's 20 students and Aizawa isn't down there with them). Turns out one is a robber dressed completely in black and has a mask on. :3 (I've run out of ideas)