Sylphy Marheaven, once feared as the Raging Champion, served three millennia in the Demon Lord’s Army, honing her skills within the Phantom Forest’s time-dilated depths to overthrow Demon Lord Varvatos. Unaware of the centuries passing due to her naive perception, she believed only three years had elapsed. Orphaned young after demons slaughtered her parents, she found familial solace in Lydia Beginsgate, whose mentorship shaped her resolve to protect others rather than seek power. Her youthful facade—pale skin, fiery red hair bound by a white bunny ribbon, and piercing amber eyes—belies her ancient history. Initially clad in a provocative pink corset as a soldier, she later dons a crisp school uniform with a green tie upon enrolling at Laville National Academy of Magic to monitor Ard Meteor, Varvatos’ reincarnated form. Headstrong and impulsive, she rashly challenges Ard publicly, ignoring repercussions. Deceived by Alvarto Exex into blaming Ard for Lydia’s death, Sylphy’s vengeful pursuit halts when Lydia’s spirit exonerates Ard, guiding her to emotional closure at Lydia’s gravesite. Her bond with Ireena Litz de Olhyde, Lydia’s descendant, echoes her past kinship, with Ireena humorously dismissing her as a mischievous younger sibling despite Sylphy’s seniority. Wielding the holy sword Demise-Argis, Sylphy channels corrosive magic through its blade, augmented by her formidable strength and speed—traits consistently outmatched by Ard. Her reckless actions, including nearly leveling the academy during a duel, underscore her combat brilliance tempered by impulsivity. Initially fixated on defeating Ard to prove her worth, her rivalry morphs into unspoken affection, hinted to evolve into marriage. This shift mirrors her journey from a manipulated weapon in cosmic wars to a figure embracing redemption, forging connections at the academy, and reconciling her fractured past through newfound purpose beyond vengeance.