Gaara

“A soul needs a purpose to live…and so I concluded that my purpose was to kill everyone besides myself. "- Gaara, Naruto

Gaara (我愛羅, Gaara) is a shinobi of Sunagakure. He was made the jinchūriki 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. After being defeated by Naruto Uzumaki — a jinchūriki like himself who found strength in his friendships — Gaara starts emulating him. He becomes Suna's Fifth Kazekage (五代目風影, Godaime Kazekage, literally meaning: Fifth Wind Shadow) so that he can protect the village and all those who live there, dispelling the fears he cast on the villagers. When Gaara was a child he ended up being born prematurely and, from the ordeals of childbirth, his mother, Karura, died. Before dying, Karura looked lovingly at Gaara's small form and vowed to always protect him.