Rie Shibusawa occupies the role of vice-president within St. Ignacio’s Etiquette Club, her fiery unpredictability and volatile temperament clashing vividly against Reika Ayanokoji’s calm, methodical leadership. This contrast cements her as Reika’s foil, her impulsive decisions often counterbalanced by the president’s strategic restraint.

Her steadfast loyalty anchors her motivations, driving her to prioritize Reika’s directives and her family’s expectations above all else. A deep-seated disdain for the rival Debutante Club sharpens her resolve to defend the Etiquette Club’s principles, though academic challenges highlight her duality as both an unpolished student and a formidable combatant within the covert Exters task force.

As Exters’ primary trainer, she employs relentless drills and exacting standards to mold recruits, her tactical ingenuity evident during high-stakes operations—from thwarting heists to orchestrating hostage rescues. Though her abrasive demeanor dominates, sporadic cracks in her armor surface, particularly when Reika tempers her outbursts, hinting at an underlying willingness to reconcile her authoritative rigor with empathy.

Her past remains undefined beyond her current affiliations, with character growth focused on navigating the pressures of mentorship while upholding unyielding allegiance to Exters’ objectives.