In one small room is a pale, man. He happens to be the king of Vampires. He is chained to the wall, and the chain is just long enough for him to move around his cell. His cell is the same as the test subject's but he can't leave. He's got chains around one foot and one wrist, keeping him chained to the cell. Every day the scientists come and draw a large amount of his blood, he's weakened by this and is unable to escape. They also deliver him blood and food so he won't starve. He wouldn't be able to die from starvation, but it's better he be healthy. Test subjects are allowed to go look at him, and chat with him. He is the reason most of them survived becoming a test subject after all. In other places on the floor are the other captured monsters, with similar problems.
The King's Chamber, Werewolf Cells, Demon Cells