Megistus commands Agastia’s daily operations as chief of staff, wielding pragmatism and discipline to steer the organization’s pursuit of global influence. His imposing demeanor belies a principled leader who enforces a dual mandate: advancing Agastia’s ambitions while safeguarding employee welfare and civilian lives. He routinely counters reckless directives from superiors, dismantling ill-conceived plans—like a Valentine’s Day chocolate monster riddled with hazardous metal shards—or demanding rigorous justification for high-stakes proposals.

He mandates paid leave and healthcare protocols, openly chastising subordinates who sacrifice well-being for productivity. Though unwavering in loyalty to Agastia’s leader, Akashic, he openly disputes her caprices when they jeopardize operational integrity, such as vetoing last-minute monster redesigns that favor aesthetics over utility.

His authority bridges departments, resolving disputes and allocating resources to align projects with strategic objectives. When rivals threaten Agastia, he orchestrates defenses without disrupting core operations. While entrenched in administration, he occasionally ventures into fieldwork, deploying tactical precision to shield agents from external dangers.

Consistently portrayed as Agastia’s anchor, he prioritizes responsibility over personal ambition. Interactions with subordinates like Kuroitsu reveal a mentor who balances guidance with unyielding adherence to the organization’s code, countering rival factions that flout ethical boundaries.