Papillon Myu operates as a Terrestrial Specter within Hades' forces, assigned to Wyvern Rhadamanthys' command. His surplice features intricate butterfly-inspired motifs, earning him the epithet "Underworld's Butterfly," with design symbolism echoing themes of resurrection and the soul’s journey across global mythologies. His classification as the "Terrestrial Bewitching Star" references the Water Margin’s Du Qian, adapted through Japanese wordplay merging "butterfly" and "bewitching." A 19-year-old Austrian prior to his transformation, Myu awakened as a Specter during Hades’ resurrection, unlocking latent spectral powers and ancestral memories spanning millennia while retaining his youthful physiology. During the assault on Athena’s Sanctuary, he clashed with Aries Mu, showcasing metamorphic combat forms: amorphous slime, larval cocoon, and a final winged humanoid state. Tactics included immobilizing adversaries with Silky Thread webs, conjuring underworld fairies via Fairy Thronging to transport targets to Hades’ realm, and telekinetically manipulating objects to restrict movement. The battle exposed a psychological flaw: though Specters are deathless, Myu’s residual human fear of obliteration—stemming from Hades’ recruitment of living humans rather than resurrected warriors like Gold Saints—left him vulnerable. Trapped in Mu’s Crystal Net, his counterstrike backfired due to the barrier’s reflective properties, resulting in annihilation via Starlight Extinction. A solitary surviving fairy persisted post-destruction, dispatched to surveil Sanctuary until Shaka eradicated it with Buddhist prayer beads. The character’s documented history remains strictly confined to the Hades Chapter, absent from spin-offs, films, or alternate continuities.