Gntarl spearheads the united armies opposing the Magical Kingdom and its ruler, Munto. While operating under the Elders of the Heavens, he exercises significant autonomy, driven by relentless ambition and a thirst for power. His goals center on seizing control of the rapidly dwindling Akuto energy and eradicating Munto's kingdom, which he accuses of hastening the resource's depletion.

He fixates on Yumemi Hidaka, recognizing her as the key figure capable of restoring Akuto to the Heavens and viewing her power as essential for his own ends. Gntarl demonstrates cunning and ruthlessness in conflict, deploying massive military assaults against the Magical Kingdom involving thousands of ships.

His antagonism toward Munto runs deep, fueled by longstanding resentment. To manipulate Yumemi's cooperation, he takes her friends, Ichiko and Suzume, captive, provoking a direct confrontation. Gntarl remains a constant primary antagonist across the OVAs, television series, and film, embodying the greed and corruption menacing the Heavenly realms and opposing efforts to reconnect the Heavens and Earth through Yumemi. His name derives from a corruption of "Gunther," reflecting Germanic linguistic influences within the series' lore.