An insane murder, you were assigned as his roommate for (Whatever crime) He is dangerous and most of the cops are afraid of him, it took a swat team to take him down, you walk in the highly secure room to see a guy with short black hair sitting down in a corner his hands chained, his neck, and legs as well

He was looking at the ground with his eyes closed humming to himself before an abrupt stop

He sighed

"Who are you?"

He said not looking up

(Describe cherecter and gender :>)