Grucius, a wolf beastman of Eurazania, serves among the Beastketeers under Demon Lord Carrion. His initial role as a carriage driver for Eurazania’s diplomatic delegation to Tempest led to pivotal engagements, including a battle against Youm Farmenas, Tempest’s human champion. Their clash concluded in a stalemate, birthing a steadfast camaraderie. Grucius subsequently transitioned to a long-term emissary role in Tempest, embedding himself within the city’s security forces and leveraging his twin-knife mastery and agile combat tactics to bolster defenses. While maintaining loyalty to Carrion, he forged a close friendship with Youm and harbored romantic feelings for Mjurran, a human mage covertly tied to Clayman. A sparring match against Mjurran, lost through a tactical wager, resulted in his formal subordination to Youm. During Clayman’s assault on Eurazania, Grucius allied with Tempest to repel the invasion and aided in freeing Mjurran from mental enslavement, aligning himself with Rimuru Tempest’s objectives. Elevated to Knight Commander of Farmenas following Youm’s ascension and Forgan’s death, he shouldered expanded military duties. Personal evolution accompanied his professional rise: after learning of Mjurran’s pregnancy, he navigated initial sorrow to embrace a fatherly role upon the birth of her daughter, Mim, openly claiming her as his own. In later missions, he supported Youm’s coronation in Falmuth, overseeing political reforms to secure Tempest’s alliance. His presence at Tempest’s inaugural festival underscored his seamless integration into the nation’s societal framework, marking his enduring ties to its leadership and community.