Gareth will always be completely unable to sleep. It will not cause him any discomfort, as no matter how much physical activity he does, or how much energy he uses, he will never in fact require any sleep or rest, and will never even tire. He'll always have the perfect amount of energy. He will also be immune to sleep inducing, lullaby, sedation and hypnokinesis, and sleeping drugs would have no effect upon him. He will be immune to the sleep-inducing effect of hypnotic bubble, but not the original hypnotic effect. He will also prove immune to being forced to sleep using abilities such as human manipulation, biokinesis, songspeak, enchanted voice, persuasion, command and musical empathic projection.