Synonyms: Insomnia, Never Sleep, Tireless, Endurance
The character requires little to no sleep. He can stay awake for an entire week and still function properly. Under normal circumstances, he barely needs to sleep four hours per night.
He is particularly endurant and can sustain physical effort five times longer than an average person.
Medieval life often require short nights of sleep. The most devout monks will pray every two hours including at night and the most reliable messengers will walk and ride for days without sleep. A strong tolerance to sleep depravation can be vital in the most critical situations.