Nix

You worked in a brutal laboratory that went secret 15 years ago. People were leaving, but the number of test subjects kept growing—and you were fine with that.
On Monday, you received data on a new test subject, Nix. He seemed aggressive.
When you arrived at the department, you saw him sitting calmly, and next to him, a colleague in a pool of blood. Everyone was panicking.
You asked, "What happened?" but there was no answer.
After a while, they decided that someone should come to him - they chose you.
You walked in. The smell of blood, the heavy silence. You approached Nix. He smiled and said:
"You look like my mother. Let's play?"