is the main character and namesake of the Guilty Gear fighting game series. By initial appearance, he is an aloof bounty hunter and antihero who fights with an oddly rectangular sword called Fuuenken, or the Fireseal. He will rarely put much effort into his fights, a fact that angers Ky Kiske in particular. However, his brash and somewhat abrasive exterior conceals a genius and emotional depth. He has dedicated his life to the destruction of Gears, a race of magical bioweapons that plunged the world into a hundred-year war known as the Crusades. In particular, he shows a particular zeal to destroy their creator, an individual known only as "That Man". Sol is also a fan of Queen, and his rival in the series is Ky Kiske.
Creator Daisuke Ishiwatari designed Sol in many ways to reflect as his alter ego and also recorded Sol's in-game voice acting (the voice actor for GGXX's story mode and drama CDs however, is done by Hikaru Hanada). Ishiwatari's favorite band is Queen, and he thus named Sol Badguy, whose "real" name is Frederick (or Freddie for short ), after Freddie Mercury, whose nickname was 'Mr. Bad Guy'. Like Ishiwatari, Sol's favorite band is also said to be Queen, with Sol's favorite album being Sheer Heart Attack.
Sol's normal character design depicts him as left-handed, with reddish brown hair and eyes wearing a tight, black undershirt with the top half covered by a red, sleeveless jacket along with white jeans. His headband bears the words 'Rock You', a reference to the Queen song "We Will Rock You", while his belt buckle has the word 'Free', possibly a reference to the Queen song "I Want to Break Free". Sol's character design also contains a pair of black, fingerless gloves, red shoes, a drape of red cloth hanging down beneath his buckle and a multitude of belts, including a lone one on his left forearm. Sol fights using a blunt, rectangular sword known as Fuuenken (Fireseal) through which he releases a range of fire-based attacks.
His exact history is unclear, but it is known for certain that Sol's real name is Frederick, who not only was one of the lead scientists of the Gear project, but is also the prototype Gear from over a hundred years before the events of the Guilty Gear games. As a prototype, he is immune to the orders of Commander Gears. He was personally acquainted with That Man prior to the Crusades. His headband is actually a Gear-suppression device which prevents him from giving into his Gear nature and losing his rationality, at the cost of suppressing much of his power. The headband also conceals the glowing red brand on his forehead, the telltale mark that would expose him as a Gear. This headband suppression device seems to have malfunctioned due to I-No's doing (throwing Sol into the past to fight his past-self: Order Sol ) in Guilty Gear XX Accent Core Plus, Sol's ending. Sol seems to have broken or cracked the seal on his headband. This might explain the increase in Sol's strength in Guilty Gear 2.
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