Blacky operates as a military commander for the antagonistic Vegan Empire, threatening Earth under the command of higher-ranking officials like Gandal. He reports directly to them on military activities and enemy engagements. His core duties involve deploying destructive Saucer Beasts against Earth's defenses and coordinating assaults to eliminate key threats, specifically Duke Fleed and his mecha, Grendizer.

In the original *UFO Robo Grendizer* continuity, Blacky commanded Vegan forces during the Earth invasion. He initiated attacks by dispatching Saucer Beasts such as GilGil to devastate Tokyo, directly confronting Duke Fleed and Grendizer. His tactical repertoire included reconnaissance missions to locate Grendizer's hiding place and employing mind-control technology to turn Earth's defenders, including Koji Kabuto piloting Mazinger Z, against Duke Fleed.

The *Grendizer U* reboot maintains Blacky's role as a persistent adversary within the Vegan command structure. He participates in strategic operations targeting the protagonists, including assaults on the Photonic Power Labs. His actions drive escalating conflicts, though his involvement typically concludes with tactical defeats, such as the destruction of his mecha Zeoladizer in combat, diminishing his direct threat in later events. His character remains confined to established antagonistic duties across both original and reboot storylines, without significant evolution, personal history, or expanded roles in other media.