Charles Arbor, eldest scion of the influential Arbor Duke family in Beltrum Kingdom, inherited leadership of the Royal Guard Knights through noble privilege rather than skill. His reckless temperament—marked by volatile outbursts, hasty violence, and emotion-driven choices—sowed discord within the kingdom’s political landscape. At the royal academy, his resentment festered against Haruto Amakawa, a commoner whose tactical brilliance eclipsed his own. A crushing defeat by Haruto in a mock battle fractured Charles’s pride, igniting a vendetta that culminated in falsely accusing Haruto of abducting Princess Flora Beltrum. Charles’s orchestration of Haruto’s torture and the scandal’s aftermath cost him his command, deepening his spite. Leveraging his family’s revived influence, Charles schemed to secure power through a coerced marriage with Celia Claire, Haruto’s ally. Haruto’s intervention foiled the plot, delivering Charles another public humiliation. Desperate to reclaim status, he allied with Reiss Vulfe, a shadowy manipulator exploiting Charles’s thirst for vengeance. Blind to Reiss’s grander designs, Charles aided in Princess Christina Beltrum’s abduction—a gambit that ended with his defeat by Haruto and imprisonment by the Restoration faction. Interrogations revealed his scant knowledge of Reiss and Lucius Orgueil’s deeper conspiracies. Released through political bargaining, Charles joined Renji Kikuchi’s Rodania attack force, trading ambitions of personal glory for a strained pursuit of familial redemption. His arc traces a path of entitlement and vengeance, each choice fueled by insecurity and a hunger for dominance. Though sporadic attempts at atonement emerge, his legacy remains tethered to the ruin wrought by his ruthlessness and self-interest.