A rancor keeper was in the service of Daimyo Boba Fett, helping him take care of the rancor given to Fett by the Twins.
The debut of the rancor keeper occurred in the The Book of Boba Fett television series episode titled "Chapter 3: The Streets of Mos Espa," which was the third episode. It premiered on Disney+ on January 12, 2022, with Danny Trejo portraying the character.