The Strongest Returns
If Hugo said he enjoyed doing what he did, then perhaps he'd have to commit suicide out of guilt. He hated it. Their looks as they begged for mercy, their screams as he tortured them. Everything was sickening.
But he still did it. Because he as an individual did not matter in the scheme of things. If he had to be the only evil person in a world of saints and angels, then so be it. As long as the darkness no longer plagued the world.
The experiments conducted on the Plague Monsters yielded no result. The physician and the rest of the Plague Doctor Department quickly burned through their available supply of Plague Monsters. It wasn't worth it. To hear those inhuman screams, then see the bodies completely disintegrate in the next second.