Bat Robis commands as a general in the Dunbas army, his burly and physically imposing stature marking his presence. He repeatedly clashes with the protagonist Luna, suffering comedic setbacks where he appears foolish or is deftly outmaneuvered. Despite these repeated defeats and humiliations, he displays notable bravery by refusing to retreat upon encountering Varga, Luna's giant lizard companion.

Fueled by these setbacks, his determination to battle Luna only intensifies, driving his persistent pursuit. A significant shift occurs when his nephew, Jeune, develops romantic feelings for Luna. This familial connection prompts Bat Robis to gradually warm toward her, transitioning from outright hostility to grudging acceptance.

Functioning primarily as comedic relief throughout the series, he generates lighthearted moments through over-the-top reactions and spectacular failures. His role frequently involves high-speed pursuits kicking up dust clouds, often culminating in collisions with structures, reinforcing his boisterous and physically driven persona.