Jaco Teirimentenpibosshi, commonly known as Jaco, is a comedic yet skilled Galactic Patrolman in the Dragon Ball universe. He first appears in the manga 'Jaco the Galactic Patrolman' and later joins the main Dragon Ball series. Jaco is tasked with protecting Earth from extraterrestrial threats, often interacting with key characters like Bulma and the Saiyans. Though he comes across as arrogant and bumbling, Jaco is loyal and determined to uphold justice, adding humor and a unique dynamic to the series.