Karen Helvetius reigns as Empress of the Mulnite Empire and Supreme Commander of the Seven Crimson Lords, a title she once held herself before ascending the throne. Her enduring friendship with Yurin Gandesblood—mother of Terakomari Gandesblood—led her to appoint Terakomari to the Crimson Lords upon discovering the girl’s latent power, awakened during a school confrontation with bully Millicent Bluenight. Platinum-blonde hair cascades to her waist, its ends loosely rolled, while piercing purple eyes command attention beneath a silver crown adorned with a violet gem. Her figure, accentuated by a crimson dress with a plunging white neckline and black heels, exudes regal confidence tempered by playful charm. A ruler of calculated benevolence, she enforces unwavering discipline, stripping the arrogant Odilon Metal of his rank for treason and installing Sakuna Memoir as his replacement. Yet she tempers justice with mercy, pardoning Sakuna’s past affiliations and offering Millicent parole contingent on leading the 5th Unit to redeem her crimes. Her rapport with Terakomari blends mischievous teasing—playful offers of breast massages, stolen kisses during slumber—with shrewd foresight. She orchestrates battles against foes like Count Madhart Bluenight, steering Terakomari to harness the "Mercy of the Lonely Crimson" by championing compassion over sheer force. Mastery of magic, sharpened through her Crimson Lord tenure, complements her tactical intellect. She delegates loyal agents like the maid Villhaze to bolster Terakomari’s growth, weaving pragmatism with generosity to fortify her empire while cultivating those she deems capable.