The Uo Uo no Mi is a fictional Devil Fruit from the anime and manga series One Piece created by Eiichiro Oda. This fruit grants its user the ability to transform into a dragon, specifically a sea dragon, and allows them to control water. It is classified as a Zoan-type fruit, which means it enables the user to take on different forms. The fruit was consumed by Kaido, one of the series' main antagonists and a member of the Yonko. As a result, Kaido possesses immense strength and durability, making him one of the most formidable characters in the series. The Uo Uo no Mi plays a significant role in his character development and the overarching plot of One Piece.