Kurama, also known as Nine-tailed Fox, or simply the Nine-Tails, is a major part of the Naruto series. Introduced in the very beginning as a monster fox that once ravaged Konoha, he was seen sealed inside a young Naruto Uzumaki by the 4th Hokage. From there onwards, Naruto's life changed dramatically because of this beast that he carried inside. He was ostracized, hated, and treated with contempt by everyone around him.