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Yes, she's just a female Kefka, to put it simply. She mentions being 'augmented', in Zozo, but she's just refering to the infusion of Magitek. She probably had a family at one time, maybe she was taken from an Imperial couple, or maybe she was a war orphan... but she's completly human, just a Magitek infused one like a lot of Imperial soldiers.
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You can consistently defeat Chupon with General Leo's Shock ability. It instant-kills him. :D
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You might also get lucky (like I did) and have Edgar cast Stop.
That's the only time I defeated him (although I did have the Atma Weapon/Blizzard Genji Glove combo)