Hwa Jai is a character from the Fatal Fury series and The King of Fighters series. He first appeared in the original Fatal Fury game and appeared as a playable character once more in The King of Fighters XIII.

A former Muay Thai champion, he was defeated by Joe Higashi. Vowing to overcome the Tiger Kick with his own Dragon Kick, he was convinced his style should be more violent and brutal to defeat his rival. Killing thugs as he trained, he was eventually shunned by the martial arts world. Noticing Geese Howard's strength, he became his subordinate soon after.

During the King of Fighters tournament, he seeks to triumph over Joe for all the despair his rival caused him since his loss. However after Joe defeats him again, he realizes that he had lost due to his weak mind and spirit. Reformed, he leaves Geese's employment and becomes good friends with Joe and supports him as Muay Thai's unbeatable champion.

(Source: SNK wiki)