Pusan, also known as Dr. Agon, serves as a pivotal ally in the protagonist’s mission. Masquerading initially as a reclusive scholar dwelling near the antagonist’s stronghold, his true nature emerges as the Zenith Dragon—a primordial being with dominion over dimensional realms. His ascension to this draconic state hinges on acquiring the Golden Orb, a relic vital to closing the gateway to the Demon World.

When the protagonist uncovers their orb fragment is a forgery, Pusan orchestrates a journey through time, aided by ethereal fairies, to reclaim the authentic artifact from the protagonist’s past. His involvement peaks during the climactic siege, where his Zenith Dragon form becomes the conduit for breaching the antagonist’s defenses, ferrying the heroes to their decisive confrontation.

Steeped in ancient lore tied to the Zenithian bloodline, Pusan’s insights into the orb’s legacy position him as both mentor and linchpin, seamlessly uniting mortal resolve with celestial power to thwart the encroaching cataclysm.