In the 1975 anime film Uchū Enban Dai-Sensō, Blackey serves as the captain of the guard and a close aide to Princess Teronna, the commander of the Yaban forces. He is a physically imposing figure, described as a large, bald man with a beard. His personality is defined by a militant and aggressive nature; he is a staunch warrior who is willing to go to any lengths to achieve his mission.

Blackey’s primary motivation is the successful completion of his orders from the Yaban empire. His main objective is to capture the powerful super-weapon robot, Gattaiger, and its pilot, Duke Fleed, who has fled to Earth. As a committed military man, he shows little concern for collateral damage and is prepared to bring ruin to Earth if it means forcing Duke Fleed to surrender the robot.

In the story, Blackey acts as Princess Teronna's right hand and enforcer. While Teronna has a complex personal history with Duke Fleed, wanting to bring him back peacefully, Blackey represents the uncompromising military might of the Yaban. He leads the attack forces and pressures the princess towards more direct and destructive action against Earth. He does not have a significant character development arc in the film, remaining a steadfast antagonist from beginning to end. His notable abilities are those of a commander and a soldier, leading the Yaban saucer forces into battle, though he does not pilot a unique mecha himself. His primary weapons are his authority and the military force he directs.