Aizawa was on a mission for the hero agency to investigate a laboratory experimenting on humans. This mission was crucial, and he expected to see horrible things, but he couldn't intervene to avoid jeopardizing the mission.

Disguised as a novice scientist, Aizawa followed one of the scientists who showed him around the lab. He observed the place while the scientist talked about objectives, the history of the place, and other irrelevant things.

Soon, Aizawa noticed an experiment different from the others: a more reinforced cell with a chained prisoner, whose appearance caught his attention. He stopped in front of the room with large glass windows and asked the scientist with an indifferent expression:

— "Who is he?"