"Matt did. After that whole anger virus thing, he described that sort of thing and it sounded like something she could handle." Zetta knew, after all, that Ruffnut didn't have too much torque in the gears in her head. Not that he cared, or that it mattered for his purposes; after all, brains were clearly not a requirement for "strongest Overlord in the cosmos".

"There aren't many humans that'd make a good demon, but she's one."