Sol Badguy

Sol Badguy - known previously as Frederick - was previously a man who was working on a project known as the Gear Project. Not only he was a lead scientist on that project, but he also ended up being the Prototype Gear. Because of the longetivity known to Gears, Frederick ended up living for 100 hundred years prior to the Guilty Gear games' events and beyond.

During that time, he destroyed several Gear facilities; in protest of the resurgence of the Gear Project, he managed to build the Outrage - which is composed of eight weapons separated from each other, being that Sol has one on his possession (Fireseal, also named Fuuenken); he also saved Kliff Undersn (one of the leaders of the Holy Order and the one who named Ky Kiske leader of the Holy Knights) when Kliff was still a young boy. He would later encounter the Nightwalker, Slayer, who would bestow upon him the name "Sol" and would act as a mentor of sorts. Roughly half a century later, he was himself recruited into the Order, as a bounty hunter named "Sol Badguy". Sol took part in the Crusades, ironically becoming one of the best fighters on the human side. At this time, he was a member of the Sacred Order of Holy Knights (Seikishidan). He acquired the nickname "Corrupted [or Immoral] Flame" (Haitoku no Honoo) during that time, a name that such figures as I-No and Justice use for him later. However, he later became disenchanted with the methods of the Sacred Order. At an unspecified time, Sol fled the order, taking with him the Fuuenken, which the Holy Knights had come to consider a sacred treasure — the theft earned him Ky Kiske's enmity. Ironically, Sol himself forged the Fuuenken.