Hwa Jai grew up in
the jungle and learned Muay Thai with the aim to become the world champion.
However, he was always defeated by the young and reckless Joe
Higashi. Hwa Jai started taking special drugs to improve his fighting, and soon went to
Southtown where his illegal methods wouldn't matter. He entered the King
of Fighters tournament to beat Joe, but failed again. However, he forgot
his rivalry with Joe and now helps him as a sparring partner.
After being defeated by Joe
in 1992's KOF, he and Joe eventually became friends. Now, he realizes that life
isn't about winning and he and Joe support each other all the time. His KOF
counterpart is rougher than his Fatal Fury counterpart, talking in a more brutal
and intimidating manner. Even though he claims to have changed, he is rather
cocky of his skills and is ready to start a fight at any time. His friendship
with Joe has also been abandoned, thinking that he still needs to defeat his
rival in a match.