Mandora, an intergalactic law enforcement officer designated as an Evil Chaser 1st Class with the Interplanetary Control Force, first appeared in the ThunderCats animated series episode "Mandora - The Evil Chaser," which aired on September 20, 1985. Introduced as a stern and protocol-driven professional, she patrols the galaxy to apprehend and transport dangerous criminals to facilities such as the Gray Penal Planet. In her debut, Mandora arrives on Third Earth aboard her advanced hoverbike, the Electro-Charger, after Lion-O accidentally releases three notorious prisoners—Quick Pick, Plutar, and Burnout—from a containment unit, compelling him and Snarf to assist in their recapture amid various threats, including the Living Ooze and Mudhogs.

As a recurring supporting character, Mandora forms an alliance with the ThunderCats, often clashing with their impulsive approaches due to her strict adherence to regulations while demonstrating competence and resourcefulness. She employs specialized weapons and tools, such as an enzyme catalyzer to dissolve organic hazards, and maintains a hardline stance on justice. Her episodes highlight her role in maintaining galactic order, with interactions that underscore her reliability despite initial frustrations with the ThunderCats' methods.

In subsequent appearances, particularly the episode "Mandora and the Pirates," Mandora faces capture by the robotic pirate Captain Cracker, who orchestrates a takeover of the Gray Prison Planet and frees its inmates. Rescued through the intervention of Lion-O and the ThunderCats, with aid from the reformed convict Quick Pick, she reestablishes control and reinforces her commitment to law enforcement. Mandora's portrayals emphasize themes of duty and perseverance, positioning her as a steadfast, by-the-book authority figure who contributes to the broader defense of Third Earth against criminal elements.