Sol Badguy, originally known as Frederick Bulsara, is the main protagonist of the Guilty Gear series. He is a powerful and enigmatic bounty hunter known for his brash and rebellious personality. Sol is a former scientist who played a significant role in the creation of the Gears – biological weapons that are central to the series' story. Throughout Guilty Gear Xrd, Sol continues his mission to stop the misuse of Gears and protect humanity. His past and motivations gradually unfold, revealing his complex history with other key characters in the series.