Ling Ling's older sister, she is the partner and lover of Le Bled. Unlike Ling Ling, she seems to have a disdain for helping the sick. She wears black as a sign of mourning for the patients that she has killed to end their suffering. Lang Lang looks after Le Bled and helps in his thefts. She worries that Le Bled is pushing himself too far and cares for him to the best of her ability. She inherited the design for Dr. Hsu’s last Megamaton Hiroh, which she had built for Le Bled.