Grucius is a Lycanthrope from the Beast Kingdom of Eurazania. His true animal form manifests as a werewolf. In his Half-Beast Form, he maintains a humanoid structure while exhibiting distinct wolf-like traits, his entire body covered in grey fur and featuring the head of a wolf. His humanoid appearance presents a rugged, muscular individual with ash-grey hair and dark-toned skin, typically seen wearing a sleeveless blue outfit paired with a white jacket. He maintains a laidback and open-minded demeanor, facilitating easy friendship. Grucius is known for speaking his mind directly and possesses a stubborn streak. He deeply values personal freedom and expresses a desire to broaden his horizons by learning more about the world. This accepting nature underpins his close bonds, including his friendship with Youm Farmenas, the Goblin riders, and a deep connection with Mjurran, whom he considers his first true Majin friend despite occasional candid remarks about his interest in her. Trained by Carrion, Grucius is a skilled combatant recognized for notable speed and strength. He wields twin daggers creatively in both close combat and as throwing weapons, showcasing an adaptable fighting style. His intrinsic abilities include "Beastialize" for transformation and "Self-Regeneration" for recovery, complemented by a tolerance for magic resistance. Arriving in the Tempest Federation initially as part of an Eurazania delegation following a non-aggression pact, Grucius chose to remain, collaborating with Tempest's security forces. During this period, he forged a strong camaraderie with Youm and developed romantic feelings for Mjurran. When Youm ascended as king of Farmenas, Grucius was appointed commander of the royal knights, succeeding the deceased Forgan. Following the revelation of Mjurran’s pregnancy, Grucius experienced sadness but later embraced a fatherly role upon the birth of her daughter, Mim, whom he regards as his own child.