Helios, guardian priest of Elysion—a sacred realm linked to Earth—protects the Golden Crystal and upholds spiritual balance alongside the Maenads. Bound by a shared curse from Queen Nehelenia of the Dead Moon Circus, his fate intertwines with Prince Endymion (Mamoru Chiba). The curse transforms Helios into the winged unicorn Pegasus, trapping his physical form and forcing him to communicate through dreams. Seeking sanctuary from Nehelenia’s influence, he hides within Chibiusa’s subconscious, guiding her with mystical artifacts like the Crystal Carillon and Moon Kaleido Scope. These tools empower Chibiusa and Sailor Moon to wield Moon Gorgeous Meditation against Dead Moon’s forces. Though initially convinced Sailor Moon fulfills the prophecy, Helios recognizes Chibiusa’s unique bond to the Golden Crystal, later discovered within Mamoru. Originating from the Silver Millennium era, Helios once prayed at Elysion’s shrine under Prince Endymion’s earthly rule. A forewarning vision from Princess Serenity preceded his capture by Dead Moon, which corrupted Elysion. The curse etches a black rose into his chest, mirroring Mamoru’s suffering and symbolizing their entwined destinies. During the Dream Arc, Helios endures Nehelenia’s torment, steadfastly aiding the Sailor Guardians through astral projections. Chibiusa’s Pink Moon Crystal ultimately revives him after Nehelenia’s downfall, forging a profound connection that hints at future romance as she ages. In the manga and *Sailor Moon Eternal*, Helios guides Mamoru and Usagi to awaken the Golden Crystal’s latent power, though he cannot command it directly. His final duty restores Elysion’s sanctity, reaffirming his role as spiritual guardian. The narrative subtly weaves Greek mythology into his identity through his name and Elysion’s themes, without defining specific religious rites. Helios’s journey underscores sacrifice, loyalty, and the tension between cosmic duty and personal bonds, bridging Earth’s legacy and the celestial order governing the Sailor Guardians’ world.