Deployed to Earth to defend against the criminal organization Makuu and its leader Don Horror. He operates incognito as Retsu Ichijouji, taking a job at the Avalon Youth Club in Japan to track Makuu's forces and protect the planet.
The narrator provides the story context for Gavan's adventures
Kojiro works with Gavan at the Avalon Youth Club
Retsu's human friend
Primary antagonist opposing Retsu
Qom is Gavan's superior who sends him on missions
Marin assists Qom in providing information to Gavan
Gavan works with Mimi who assists him in his mission
Voicer provides Gavan with his equipment and technology
Tamiko is Gavan's mother, making Earth his mother's home world
Explore the full interactive character relationship map of Space Sheriff Gavan