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A tall, bright red Gear with a large yellow horn and small black wings that was piloted over 500 years ago by Roni Fatima, the first king and founder of Aveh. After the Shevat-Solaris War, Roni sealed the Omnigear away inside of Ft. Jasper, which was then hidden in the Nisan mausoleum. A legend was then passed down through the Fatima Dynasty that if ever Aveh or Nisan were in peril then Roni's descendants could unlock the treasure wake the Omnigear from its slumber to save either nation.
Such a time came 500 years later when Roni's descendant Bart Fatima unlocked the Omnigear and claimed it for his own in order to fight back against Solaris, who had put the whole world in jeopardy, not just Aveh. Andvari is the first Omnigear that Fei Fong Wong's party obtains. Andvari is aligned with the Anima Relic Dan.
- In Xenosaga Episode III, four Gnosis appear on Abel's Ark, guarding the way to Dmitri Yuriev's location and Ω Res Novae, similar to the four pillars of Deus' core in Xenogears. These each resemble several of the Omnigears from Xenogears. One is named Natus Flamma and resembles Andvari.