One Piece: Uzumaki Menma, Picked up by Robin at the Beginning

Uzumaki Menma, who once destroyed Konoha, fell from the chaos and turned into a six-year-old child, seriously injured and lying on the unfamiliar coast of Ohara. In desperation, he met a girl, Nicole Robin, and was rescued by her... However, the tranquility was fleeting. The cannon fire of the Demon-Slaying Order tore through the sky, and O'Hara became a hell of fire. When Akainu's magma and Aokiji's ice approached step by step, the demon that destroyed Konoha in the past was already standing on top of Kyuubi's head, and the dark purple energy ball was spinning crazily in the palm of his hand. "Watch it -" He whispered, condensing the power that could overthrow the world to his fingertips: "This is the parting gift!"