Zhou lived fairly happily for the first 7 years of his life. But when his mother was killed and he was taken in by the murderess, everythings just went wrong.  In fear, degraded and humiliated he wasted away for over 70 years. After her death (in which he'd played his part) he left for England, where he tasted freedom for the first time and got drunk on it. Unlike at 'home' in Beijing, here he was respected and he soon realized he had quite some influence with his power. Nobility from all around would come to woo him into their granting their wish. The elf began to abuse his ability, taking steep prices for their wish simply for his own pleasure. It was fun, to see how much emotional pain he could cause others... empowering.

He is extremely sensitive about being addressed by his first name 'Ah Niu' and reveals it to noone. Being forced into something, being insulted, being mocked, being disrespected are all things he hates more than anything. Zhou is alright at suppressing his rage and never forgives a person. And he never forgets. With astounding patience he can and will wait for the perfect moment to ruin your life, should you mess with him.