Billy is the younger brother to Jimmy.
He does not speak to his brother because of a past event involving
Jimmy's girlfriend. Billy always had a crush on her and one day, she
was captured by a gang in the city and murdered. This gang had some history
with Billy, and Jimmy knew this. Jimmy blamed him for her death and
they haven't spoken since. Billy
trains in Ryu Zui Ken which he learned from his master, Le-song. He also trains with Lynn,
Le-song's grand daughter. He enjoys street racing and makes his living
that way. He first appeared in the 1987 arcade game by Technos, Double Dragon.