Julius Euclius, also known as Julius Juukulius, serves as a knight under Anastasia Hoshin within Lugunica's Royal Guard. Orphaned by a flash flood after his father Klein Juukulius married a commoner, Julius was adopted by his uncle Alviero Juukulius into the noble House Juukulius. Raised alongside his cousin Joshua Juukulius, the family's focus on knightly traditions led Julius to intensive swordsmanship training and eventual Royal Guard membership. His combat prowess earned him the title "Finest of Knights," while unique abilities granted him the moniker "Valuable Knight." Standing 179 cm tall with a muscular build, Julius has light purple hair neatly arranged with a strand falling over his face and distinctive yellow eyes. He typically wears the Royal Guard uniform, a white coat with red accents. He has also appeared in a black suit with blue borders for a duel, Kararagian-style clothing including a kimono and haori, and a traditional yukata. A permanent scar under his left eye remains from a battle with Reid Astrea. Julius embodies nobility, maintaining a proper and respectful aristocratic demeanor. Considerate towards others, he rigorously assesses people based on their potential for self-improvement, often delivering blunt evaluations. Deep-seated insecurities rooted in childhood trauma drive him to form strong bonds to fill emotional voids. He idealistically believes in inherent goodness, even in perceived enemies like the Witch Cult, and once inspired others by emulating chivalric ideals. Initial clashes with Subaru Natsuki arose from disapproval of Subaru's perceived arrogance. Key relationships define him: unwavering loyalty binds him to Anastasia Hoshin; mutual respect marks his friendships with Reinhard van Astrea and Felix Argyle; a complex dynamic with Subaru shifts from hostility to camaraderie. His affectionate bond with adoptive brother Joshua became strained after Julius's name was erased. Julius possesses the Divine Protection of Gathering Spirits, enabling him to see, communicate with, and contract spirits. He contracted six elemental spirits—Ia (fire), Kua (water), Aro (wind), Ik (earth), In (yang), and Nes (yin)—granting multi-elemental magic. Combining spirit arts and swordsmanship earned him the title "Spirit Knight." His signature techniques include Clarista (elemental sword infusion), Al Clarista (long-range energy beams), Fell Goa (fire-wind storms), and Nect (sensory sharing). He possesses elite swordsmanship. During Arc 5, the Sin Archbishop of Gluttony, Roy Alphard, used the Authority of Gluttony to devour Julius's name and memories. This erased Julius from the world's recollection—except for Subaru—and severed his spirit contracts, nullifying his magic. Temporarily losing his identity, he later rejoined Anastasia's camp after Subaru intervened. In Arc 6, he confronted Reid Astrea, acknowledging his insecurities during their duel and gaining Reid's respect. This catalyzed his efforts to rebuild broken bonds and accept his flaws while upholding knightly ideals to inspire others. His partnership with Subaru solidified into trust-based friendship. Later, Julius aided Subaru in rehabilitating Spica, a former Gluttony Archbishop, reflecting his belief in redemption. He participates in battles against the Witch Cult and in Vollachian conflicts, adapting tactics despite diminished powers. The spirits, retaining affinity for him, occasionally assist him post-contract rupture.