Raditz is a Saiyan warrior and the elder brother of Goku in the anime series Dragon Ball Z. Serving as one of the first major antagonists in the series, Raditz arrives on Earth to recruit Goku to join the Saiyan cause. His appearance marks the beginning of the Saiyan Saga, introducing the concept of Saiyan heritage and raising the stakes for Earth's defenders. His actions set the tone for the fierce battles and shocking revelations that follow.