Margot operates as both companion and guardian to Charlotte E. Firobisher alongside Doris and Penelope, armed with Rhomphaia—a demon sword channeling scarlet light that fuels her elemental combat prowess. Initially positioned as an adversary, she clashes with Cecily Campbell alongside her allies in a bid to seize the demon sword Aria, convinced that consolidating such power would validate Charlotte’s claim to imperial lineage.

During their first confrontation, Margot’s trio launches a coordinated assault, weaving their blades’ elemental forces into a synchronized offensive. Though Cecily withstands their onslaught, the battle leaves her gravely wounded, underscoring Margot’s reliance on teamwork and tactical mastery of Rhomphaia’s scarlet-lit capabilities.

The group’s defeat and Charlotte’s subsequent disavowal by the empire force a reckoning. Cecily brokers their asylum within the militant nation, compelling them to renounce coercion for collective defense. This pivot transforms Margot from antagonist to ally, as she joins efforts to repel imperial forces, adopting Cecily’s ethos of safeguarding over domination.

Her evolution traces a path from rigid allegiance to Charlotte toward a justice shaped by Cecily’s resolve, prioritizing collaboration in countering imperial threats. Post-defection, Margot’s engagements stress unity, particularly in joint operations against external adversaries. While her origins remain unexamined, her narrative centers on adaptation to shifting alliances and the complexities of loyalty within a broader struggle.