Julius Zagan Analeit, second prince of the Kingdom of Analeit, originally held the Hero title before its transfer to his younger brother Schlain. He possesses dark blue hair and blue eyes, typically adorned in light armor and a distinctive white muffler scarf—crafted by his late mother from high-quality spider thread shortly before Schlain's birth. Post-revival, he adopts civilian disguise attire and bears a slave symbol under contract to master Isogai.

Born to the king's third princess consort, Julius idolized Hero legends without expecting the title himself. His mother's death during Schlain's childbirth left a profound impact, her spider-silk scarf becoming a cherished memento. As Hero, he aligned with Pontiff Dustin of the Word of God religion. At age eight, Dustin deployed him in the alliance war against Sariella under the pretense of combat experience, though the pontiff's true aim was morale-boosting. Julius witnessed mass casualties from the "Nightmare of the Labyrinth" and Demon Lord's intervention, receiving unearned credit for the Nightmare's defeat. Witnessing alliance brutality during Keren County's occupation disillusioned him; he stayed to aid reconstruction and regain trust through monster hunting.

Julius displays level-headed humility and unwavering duty, refusing to leverage his Hero status. His defining trait is an inability to abandon those in need, often endangering himself and allies—a flaw he acknowledges yet cannot overcome. He respects adversaries, offering Demon General Bloe surrender during the Great Human-Demon War. He harbors a secret attraction to large-chested women, viewing it as a weakness. A deep bond with Schlain drives many actions, and he fears spiders due to a childhood incident.

Six years post-Sariella war, 12-year-old Julius accepted Pope Dustin's task to dismantle a human-trafficking ring. Skeptical of Dustin's motives after prior manipulation, he agreed following persuasion by friend Hyrince, who joined as his attendant. Elite commanders initially dismissed Julius for his youth, but his wisdom and conviction won their loyalty, particularly Vice-Deputy Commander Tiva's. The mission disrupted traffickers but failed to expose perpetrators or recover most abducted children, solidifying his party with members like Yaana, Jeskan, and Hawkin.

During the Great Human-Demon War, Julius's party defended Fort Kusorion against the First and Seventh Demon Armies. Lured into a trap by commanders Bloe and Agner, Julius dueled Bloe, overpowered him, and learned demons fought under Demon Lord duress. He vowed to kill her to end the war. A rampaging Queen Taratect then destroyed the fort; Julius attacked it futilely. Hyrince intervened to shield Julius and Yaana, but the Queen fatally crushed Yaana as she protected Julius. Enraged, Julius exploited the Queen's ocular weakness, combining Ronandt's explosive sword with his Holy Light Beam to kill it. Bloe—now seeing Julius as an existential threat—confronted him again. Julius was slain by a "mysterious white girl" (Shiraori), transferring the Hero title to Schlain.

Revived later, Julius grapples with the revelation that Heroes are tools for higher powers like Ehit and the Cult of Diablos. This knowledge, coupled with enslavement to Isogai, molds him into a colder, detached figure. Despite attacking Schlain for targeting Isogai, underlying brotherly love persists. He aligns with revived Heroes like Tenn Kujo, serving Isogai, Ainz, and Shiraori in atonement for humanity's past actions.