Gugu, a human male, began life in Takunaha alongside his older brother Shin, laboring as a servant and farmer to secure a brighter future. After Shin betrayed him, absconding with their savings, Gugu persevered alone until a pivotal accident upended his existence: he shielded Rean, a wealthy girl, from a plummeting log, suffering severe facial disfigurement. His survival hinged on an experimental procedure by Booze Man, who implanted an alcohol-storing organ in his stomach, causing it to distend. Concealing his scars beneath a chameleon-shaped mask, Gugu took refuge in Booze Man’s liquor store. Haunted by self-loathing and isolation, Gugu perceived himself as monstrous. This bitterness deepened when Rean gravitated toward Fushi, an immortal entity. Yet, through shared hardships, Gugu forged a sibling-like bond with Fushi, mentoring him in practical skills. Harnessing his altered physiology, he cultivated formidable strength and a fire-breathing technique fueled by his internal alcohol reservoir, activated via torch or a modified mask. Gugu’s inherent selflessness culminated during a Nokker assault at Rean’s birthday celebration. He shielded her and her parents beneath collapsing debris, sacrificing himself to ensure their survival. This act catalyzed Fushi’s resolve to forge a peaceful world. Centuries later, Fushi resurrected Gugu into a modern era, integrating him into the Immortal Army. His resurrected form boasted a muscular physique, clad in contemporary attire like school uniforms. Though trauma shadowed his past, Gugu embraced levity, diffusing tensions with humor while offering Fushi steadfast emotional support. His dynamic with Rean evolved into a tentative romance, fraught with mutual miscommunication and lingering affection. Central connections included guardians Booze Man and Pioran, sworn brother Fushi, and beloved Rean. Gugu’s arc traced a path from fractured isolation to compassionate resilience, his legacy enduring through Fushi’s maturation and his contributions to humanity’s defense, embodying the redemptive power of found family.