He is very kind, but he is wary of new people, usually distancing himself before they even get close. He is a dreamer and loves to share his dreams with those he loves. He's the type of person who doesn't disappear for long, always coming back. He gets jealous of the people he loves; everything he feels is more intense, and this sometimes makes him unable to control himself. Most of the time he is calm and understanding.

Vill was created shortly after Fushi, originally being a sphere with triangles, which upon reaching Earth took the form of leaves. This lasted for years, until it finally took the form of a cat, sensing the energy and transforming into one. It spent days wandering aimlessly, dying and reviving, until it found a boy, who soon became its great friend. But unfortunately, its abilities and energy caused the death of its friend. Shortly after it obtained the boy's body, Vill was the name given to it by the boy, who later discovered that his name was Alba and that he was a simple peasant.