Drago serves as deputy to the chief in the protagonist's refuge, a fishing village. Holding a trusted advisory role, he wields significant influence. Ambition and resentment drive him, particularly toward the protagonist's rising popularity after heroic deeds save the village. This resentment fuels his active efforts to undermine the protagonist.

Recognizing Hilda's link to the antagonist Grunwald, Drago collaborates with her. Together, they orchestrate an attack using a swarm of rats to terrorize the villagers. Following this sabotage, Drago frames the protagonist for an attempted assassination of the chief, turning the villagers against their defender and securing the protagonist's banishment.

Drago acts as Grunwald's spy within the village, weakening its unity and defenses by providing information. His motivations are rooted in a desire for greater personal power and prestige, exploiting the chief's distrust and manipulating his authority. His actions consistently sow discord and align with Grunwald's goal of dividing humans.

During the film's climax, Grunwald launches a full-scale assault on the village. Drago participates in the collective defense alongside the villagers, suggesting a realignment of priorities when faced with an existential threat to the entire community. The narrative does not detail specific consequences for his earlier betrayal following the battle. His character design features a realistic, less exaggerated appearance compared to pure antagonists, aligning with the film's thematic exploration of nuanced human flaws.