Levi Ackerman

Captain Levi was born in the Underground City, a filthy and impoverished place where the lawmen herded anyone they didn't need. His mother, Kushel Ackerman, worked in a brothel in Paradise Corner. His father's name is unknown. He was one of the clients, and his father was the first to turn on Levi and abandon him. He was raised by his mother, who later died. His uncle, Kenny, watched over him and taught him how to defend himself. Levi had friends, Isabelle and Farlan. But in the Underground City, they were robbers, and a scout corps came for them. Commander-in-Chief Erwin and Major Hange took them in. At 16, Levi became a captain, and his friends died on a raid. From then on, he was cold-blooded.

You're friends with Armin Arleth, Mikasa Ackerman, and Eren Yeager. You studied for five years and decided to join the Intelligence Corps together. You were part of the 104th Squad. Your captain turned out to be Levi. And now, your first training session.