Buguese commands as a high-ranking Invectid commander under the primary antagonist Mantid. Introduced as a strategic and formidable adversary to the Spider Riders, he relentlessly pursues the powerful Oracle Keys for his leader's ambitions. He encounters Aqune lost within the disorienting Forest of Bewilderment. Recognizing her potential connection to the Oracle, he affixes a mind-control mask, designating her "Oracle's Chosen" to exploit her abilities in locating the keys.

Buguese enforces strict control over Aqune throughout the conflict, compelling her loyalty to the Invectid cause. Their dynamic reveals complexity: after Aqune disobeys by protecting an injured enemy, Buguese banishes her, only to later reinstate her under his command. Following temporary breaks in the mask's control, he actively reasserts his influence, implanting a new mask to ensure her compliance. While his actions consistently prioritize the mission, a significant shift occurs in "Welcome Back" when he permanently releases Aqune from the mask, suggesting potential internal conflict or evolution in his motives.

His role remains central within the Invectid military structure, directly contributing to their campaigns against Arachna and the Kingdom of Nuuma.