Meltigemini

"Don't worry, I hear these twins put on quite a good show. Of course they're not really twins at all..."

- Kuja

Meltigemini is the fused, demonic form of Thorn and Zorn. When Thorn and Zorn were defeated by Eiko's eidolon Madeen, who took the appearance of the moogle Mog, they appeared to be dead until Kuja revealed that they were not really twins after all. Instead they were actually the demon Meltigemini. He attacks with venom and virus based attacks, however he is vulnerable to the spell Mini. Eventually, Zidane and his party defeated him once and for all.