Jaqon

Jaqon was a greater devil and former duke who lived on Avernus, the first hell of Baator, where he was exiled by Asmodeus for a great betrayal. Asmodeus changed Jaqon's name to Dagon, so that if someone tried to summon him, they would instead summon the powerful demon lord's aspect.

Description
Jaqon resembled a satyr with red skin and green eyes, but was clean shaven. His horns were small and curved like those of a pit fiend. He usually wore a weapon in a harness, and a backpack, in order to pretend to be a wandering, lost creature trying to get back home to the Prime Material plane.

Activities
Jaqon led his followers in a battle against Asmodeus, becoming an archdevil in the process.