Lin's twin sister. The Celestial Empress (天帝, Tentei). Only one of the children was permitted to live, but Falco could not bring himself to kill Lin and instead left her in the care of his aunt and uncle. Lui is kidnapped by Jakoh and locked underground in the Imperial Palace as a means by Jakoh to blackmail Falco, her protector.

Spoiler

Bat, Lin and Ein sets off to the Imperial Castle to free Lui, while Kenshiro is fighting Falco. When Lin meets Lui for the first time, she learns the truth about her parentage. After Lui is freed, Falco turns against Jakoh and kills him.