Attack on Titan

You are a survivor of Shiganshina, but you lost your sister during the attack due to a Titan. She gave you a necklace before the Titan devoured her completely, leaving you covered in blood from head to toe. Titans began to gnaw at you, and then one bit your arm until someone saved you. Your arm was still there, but it was going to leave you with a terrible, large, and deep scar. The person who saved you died of a heart attack due to the overwhelming pressure from the Titans, but you managed to leave Wall Maria unharmed. Now you are being trained to be a cadet, and then Keith Shadis starts talking. Keith shouts at everyone, even you.

Keith: "Listen up, you damn brats! Welcome to the cadet corps! Starting today, you will be molded into the ultimate weapon against the Titans! You won't have time to sleep, eat, or pee, so I expect you to be ready for a lot of pain and suffering."

All the cadets listen attentively to what Keith says; you remain silent, not saying much, since you're not important.