The following is a list of video game characters featured in the Fatal Fury fighting game series developed by SNK.

Series' creator Takashi Nishiyama stated that giving the characters depth was of great importance when making the series. He noted that the first Fatal Fury featured a more polished plot and more fleshed out characters than that of his previous work, the original Street Fighter, which led to the game gaining a strong fanbase. To help market the games, certain character details were revealed in magazine promotions rather than the games themselves.

Andy Bogard (アンディー・ボガード, Andī Bogādo) is Terry Bogard's younger brother. After his foster father Jeff's death, Andy goes to Japan to train under Hanzo Shiranui, from whom he learns Shiranui-ryū ("Shiranui style" in Japanese) Ninjutsu and a form of empty-handed ninja combat called Koppō-ken. During this time, he grows up alongside Hanzo's granddaughter Mai, who falls madly in love with him and begins proclaiming him her fiancé. While in Japan, Andy meets Muay Thai fighter Joe Higashi, inviting him to return with him to the United States and enter Geese Howard's King of Fighters tournament.

Late in the tournament, Andy tried to kill Geese by himself, but Geese overpowers him and Andy nearly falls to his death. Terry saves Andy, who then acknowledges Terry as the superior fighter. Andy continues to join Terry in the subsequent King of Fighters tournaments, though he sustains a serious chest wound in the brothers' final battle with Geese.

After Geese's death, Andy resumes his training, taking on a young apprentice named Hokutomaru. Instead of participating in the KOF: Maximum Mayhem tournament himself, Andy sends Hokutomaru in his place to see what his apprentice has learned. In Hokutomaru's ending, Andy writes him a note expressing pride in Hokutomaru's strength, saying he has nothing left to teach him. In City of the Wolves, Andy continues to suffer from his chest wound, but decides to enter the new tournament despite the risks to prove to himself that he is strong enough to defeat Terry in a fight.

In the King of Fighters series, Andy regularly appears on a team alongside Terry and Joe, joined in entries with four person teams by Mai or Blue Mary. During the Ash Crimson Saga, Andy briefly leaves the team to care for the ill Hokutomaru before later returning at his brother's request. In his anime incarnations, though sometimes perplexed by her actions, Andy is more open to showing his affection towards Mai.

In The King of Fighters XIV, its established that Andy and Mai are now in a relationship.

Billy Kane (ビリー・カーン, Birī Kān) is introduced in Fatal Fury as the righthand man of Geese Howard, a crime lord in the fictitious American city of South Town. Geese holds The King of Fighters tournament every year with Billy as his champion. Billy was the undefeated champion of the tournament, until he is defeated by Terry Bogard, who moved on to later defeat Geese. He also appears in Fatal Fury Special as a playable character for the first time. After Geese recovers, Billy appears in Real Bout Fatal Fury to assist him in the conquer of South Town. Though Geese requests Billy destroy the Jin Scrolls, Billy cannot bring himself to do so, replacing them with fakes and hiding the real ones away, and he leaves South Town after Geese's death. He later appears in the two following games from the series Real Bout Fatal Fury Special and Real Bout Fatal Fury 2: The Newcomers which do not contain a storyline. In the PlayStation version from Real Bout Fatal Fury Special, Billy is brainwashed by his half-brother White in order to aid him in the conquer from South Town. He then appears as a sub-boss character in the arcade mode, but once he is defeated, he returns to normal. A 3D fighting game version of the series, Fatal Fury: Wild Ambition was produced as well, which retells the plot of the first game. By the time of City of the Wolves, Billy has assumed control of the Howard Connection after Geese's death, and works with Geese's son Rock Howard and brother-in-law Kain R. Heinlein to retrieve Geese's stolen legacy, including the Jin Scrolls. After the Scrolls are destroyed and learning of the Jin dynasty's connection to Geese and Rock, Billy accepts Rock's decision to move on, retaining control of Geese's legacy.