Bucca-Boo reigns as the primary antagonist and Emperor of Darkness within the narrative. He poses a dire threat to the existence and well-being of a goblin village in a fantasy realm, actively seeking its destruction and demonstrating malicious intent towards the goblin community.

His power is significantly amplified through the manipulation and control of Zammie, a fallen angel who lost one wing descending from heaven. Bucca-Boo exploits Zammie's residual heavenly powers, twisting them to serve his destructive purposes and augment his own strength. This corruption forces Zammie to act against his nature and commit evil deeds under Bucca-Boo's dominion.

As the driving force of the central conflict, Bucca-Boo is perceived by the villagers as an overwhelming, growing threat, necessitating the intervention of a prophesied "flightless bird" savior. His destructive ambitions create the urgency for the protagonist's journey.

Bucca-Boo's arc culminates when Zammie is freed from his control. Coco and Chaley aid Zammie's escape from Bucca-Boo's lair and help him recover his missing wing, enabling his return to heaven. Restoring Zammie severs Bucca-Boo's access to the angel's power. Deprived of this crucial strength, Bucca-Boo is ultimately defeated, ending his reign as Emperor of Darkness and securing the goblin village's salvation.