Guy (ガイ Gai?) is a video game character who first appeared in the 1989 arcade beat-em-up Final Fight by Capcom. Guy, along with other Final Fight characters, has also been a recurring player character in the Street Fighter fighting game series since Street Fighter Alpha: Warriors' Dreams in 1995. Guy is a crimson-clad ninpō master of Japanese descent who has been taught the Bushin (武神 Warrior God?) form of ninjutsu. The kanji, 武神, written on Guy's top literally translates to "God of War".

In the original Final Fight he aides his friend Cody as well as Metro City Mayor Mike Haggar in rescuing Jessica, who is Haggar's daughter and Cody's girlfriend. Guy was excluded from the SNES version of the game, but a special version replacing Cody with Guy was also released. While he is not a playable character in the sequel Final Fight 2, Guy factors into the storyline as his girlfriend and her father are captured. Guy returned to the Final Fight series as selectable character in Final Fight 3. He also appears in Final Fight: Streetwise, but is not playable in the game's story mode. His sister-in-law is Maki Genryusai, who was introduced as one of the protagonists of Final Fight 2.

The character has been well received, often being named to various lists of top Street Fighter characters. His popularity with fans has resulted in Capcom adding him to many of its newer fighting games.