Eris Boreas Greyrat, a noble-born warrior shaped by her grandfather Sauros’ volatile legacy, wields a fiery temper alongside twin swords, her crimson hair and eyes mirroring her fierce spirit. Stranded on the Demon Continent after the Teleport Incident, she journeys with her second cousin Rudeus Greyrat and Ruijerd Superdia, an odyssey that tempers her rage into resolve. Initially scornful of Rudeus’ youth, her defiance melts into devotion after he thwarts her abduction, igniting a ferocious loyalty that drives her to shield him at any cost—a zeal that clashes with her bashfulness in tender moments, fueling mutual misunderstandings as both grapple with insecurities. When Orsted’s near-fatal assault leaves Rudeus broken, Eris vows to hone her strength, discarding her noble name and embracing the moniker “Mad Dog” as she trains relentlessly under Sword God Gal Farion. Her ascent to North Saint and Sword King crowns years of grueling discipline, battles against foes like Auber Corvette, and a steely silence that masks her turmoil. Reuniting with Rudeus, she weds him as his third wife, bearing two children while playfully rivaling him in martial skill and passion, her dominance a jest woven with truth. In later decades, her vigor never wanes; she spars and trains until her peaceful death at seventy-four. Alternate paths see her wed Luke Notos Greyrat, guard Princess Ariel as the crimson-maned “Red Lion,” and rise to Sword Saint. Mana’s toll streaks her hair with white, mellowing—but never erasing—her fiery core. Legends enshrine her as the Goddess of War, immortalized by a wooden sword symbolizing triumphs: maiming Orsted, besting elite swordsmen, and ascending as an A-rank adventurer. Her tale intertwines blade-sharp resolve, unyielding love, and the quiet ache of vulnerability, each step a battle to shield those dear and conquer her own shadows.