Design- Like his siblings, his armour is based on that of his biological origin, X, with thematic alterations. Harpuia's armour is coloured green, symbolising his alignment with wind and lightning, and his design appears to be derived both from the Harpies, wind spirits from Ancient Greek mythology with bodies of eagles and the heads of women, and the Valkyries, female spirits from Norse mythology who led the souls of deceased heroes to Valhalla. Harpuia's name itself is the Ancient Greek word for Harpy. Harpuia more closely resembles a Valkyrie in his Reploid form. His helmet is mounted with wing-like extensions that bear resemblance to a Valkyrie's helmet, and short wing-like thrusters are mounted on his back, which he uses for flying. He wields two identical energy-based swords, which presumably represent talons, and has the ability to summon whirlwinds and lightning bolts, marking his elemental parallel with the Harpies and the Valkyries respectively. Harpuia's voice is also distinctively feminine, and this, together with his parallels to female mythological figures, has led to a great deal of confusion over his gender.
In his Armed Phenomenon form, Harpuia's armour expands to become a fighter jet aircraft in the shape of an eagle. Harpuia's head appears at the helm, giving the impression of a human-headed bird, bearing a great resemblance to a Harpy.
Personality- Originally, Harpuia was a stubborn and loyal follower of X and later his duplicate Copy-X. He was proud to serve such an heroic leader and fulfilled any task given to him with absolute obedience and without any hesitation. However, things began to change when he suffered his first defeat in decades at the hands of Zero. His pride fell down to Earth and he slowly began to realize that battles couldn't be won if one didn't have the will to truly do so.
Harpuia matured during the course of the story, becoming more and more like the real X in terms of character and determination, sharing the same opinion that humans and Reploids in fact can live in peaceful coexistence, but will still destroy every Reploid who tries to threaten humanity.
The first instance of his true nature is at the beginning of Mega Man Zero 2, when Zero collapses after endlessly fighting Neo Arcadian forces for a year following his defeat of Copy X. As soon as he collapses, Harpuia arrives, riding on the griffin form of the revived Aztec Falcon. He could have easily destroyed the unconscious and heavily weakened Zero and yet brought him to the newly created Resistance Base without causing hostilities. This hints at a sense of fairness and that he is learning that the Resistance and Zero are not so different from him. The only other Guardian who seems to realize this is the deceased Phantom, who only attacked Zero in Cyberspace to test his worth as a being, having learned the truth of the legendary hero.
M.W.E.- Sometime during the Maverick War, four Reploids were created from the DNA of Mega Man X. These were Phantom, Fairy Leviathan, Fighting Fefnir and Sage Harpuia. Originally, these four were designed to fulfill certain tasks to rebuild the planet after the war ended. Harpuia's task was to cleanse the atmosphere, and he commanded a giant weather control mechaniloid in order to do so. However, it is unknown whether or not he completed this task because shortly after the Maverick War had been ended by X and the Mother Elf, a new war broke out, the Elf War.
