Demon is a Demon Lord Digimon who commands the Devil and Fallen Angel Digimon. It started out as a high-ranking Angel Digimon—much like Devimon—but fell from grace after rebelling or raging against some force of good in the Digital World, possibly the human who created it in the first place. For this, it got deleted to the Dark Area, basically the dumping ground for corrupted data. Now Demon's got a vendetta. It's sworn to take over the Digital World as payback, and it's quietly working on bringing back the "Super Ultimate Digimon" that led the original rebellion and was the strongest of all the Ultimates.
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