Melanie is one of Junior Xiong's henchmen, possibly acting as one of his bodyguards.
Miltia is Melanie's twin sister. They share a close relationship and are always seen with each other. In battle, they sync their movements and strikes to creating a flowing tag team combo.
Junior is Melanie's superior. It is implied that Melanie, along with Miltia, is Junior's bodyguard, as she is seen to follow him. Her loyalty is not as strong as her sister's, only reluctantly following. They both defend his club when Junior is attacked by Yang Xiao Long.
Melanie fought and was defeated by Yang in the "Yellow" Trailer.