EUREKA! I've solved the mystery of the inspiration behind the Eon duo.
https://en.wikipedia.org/wiki/Lares>Ancient Greek and Roman authors offer "heroes" and "daimones" as translations of "Lares";>https://en.wikipedia.org/wiki/Pok%C3%A9mon_Heroes>In the 4th century AD the Christian polemicist Arnobius, claiming among others Varro (116–27BC) as his source, describes them as once-human spirits of the underworld, therefore ancestral manes-ghosts; but also as "gods of the air", or the upper world. He also – perhaps uniquely in the literature but still claiming Varro's authority – categorises them with the frightful larvae.>In Roman mythology, the lemures /ˈlɛmjəriːz/ were shades or spirits of the restless or malignant dead,[1] and are probably cognate with an extended sense of larvae /ˈlɑːrviː/ (from Latin larva, "mask") as disturbing or frightening>Those colored annuli on Lati@s' faces are representations of masks>(劇場版ポケットモンスター 水の都の護神 ラティアスとラティオス Gekijōban Poketto Monsutā Mizu no Miyako no Mamorigami Ratiasu to Ratiosu, lit. "The Guardian Gods of the City of Water: Latias and Latios")>Lares were believed to observe, protect and influence all that happened within the boundaries of their location or function. The statues of domestic Lares were placed at the table during family meals; their presence, cult and blessing seem to have been required at all important family events. Roman writers sometimes identify or conflate them with ancestor-deities, domestic Penates and the hearth. Because of these associations, Lares are sometimes categorised as household gods but some had much broader domains. Roadways, seaways, agriculture, livestock, towns, cities, the state and its military were all under the protection of their particular Lar or Lares. 