Torn by the death of his mother and younger sister and neglected by his father, Long ran away from home. His great skills in the martial arts and powers as a zoanthrope brought him recognition, and he was enlisted by an underworld assassination unit. His ability to kill in an instant using no weapons earned him the reputation of a top assassin. However, one day he suddenly cut his ties to the Organization and set himself on the wander's way. Though the Organization tried to coerce and threaten him to return, he flatly refused. For this reason, they seek his death as a traitor.