Gaara is the 5th Kazekage of the Hidden Sand Village, son of the 4th Kazekage and younger brother of Kankuro & Temari. Gaara was once the most feared and despised person in the Sand Village as he possessed the spirit of the one-tailed Shukaku, and thus he turned developed a deep loathing towards to all humanity for his treatment.
It was during the Chunin Exams and the subsequent attack on the Leaf Village that Gaara came up against Naruto Uzumaki. After being defeated by Naruto, Gaara was shocked to find that Naruto knew very well the pain that Gaara had endured all his life and that he never gave up hope on being acknowledged as a person and ultimately found friends who truly cared for him. Seeing the determination that Naruto had to protect his friends made, Gaara decided to follow Naruto's path, wishing to become Kazekage of Sunagakure so he could be connected to his people, and hopefully have them finally acknowledge his existence as a person.