Gaara is a shinobi of Sunagakure. He was made the jinchuriki of the One-Tailed Shukaku before he was born, causing the villagers of Suna to fear him as a monster. With nobody to connect to, Gaara grew up hating the world and looking out only for himself, giving his life meaning by killing anyone he came across. Though he outwardly appears calm, "Gaara of the Sand Waterfall" is deeply unbalanced, completely unmoved by others' pleas for mercy, and, in certain situations, driven mad with bloodlust. This behavior is partly due to Shukaku, whose voice Gaara alone can hear in his head, who encourages violence at every opportunity, and who torments Gaara with threats to take control of his body if he falls asleep, thus making Gaara an insomniac. But Shukaku is not wholly responsible: Gaara simply hates other people for existing, believing that so long as they are alive they are a threat to his own life. His purpose, therefore, is to kill anyone who is strong or whom he perceives as similar to himself, as only by killing them can he assert his own existence. With those who do not interest him, Gaara is typically withdrawn and silent. When he must interact with them, he does so with open disregard for their feelings and often threatens to kill them, even his own siblings, if they become too much of a nuisance to him.