Origin
Lin Sun is a head crime boss in Hong Kong. She had built a machine that could pierce the ear drums of people to a point of death by focusing sound on a particular area. She did so on a Catholic Orphanage killing several children. She had plans of global domination until she was stopped by K-51.
K-51 jammed her machine until it exploded killing everyone by K-51, Z-19 and Lin Sun. Lin Sun was badly hurt in the accident however. Although K-51 made every effort to get her to the hospital it was too late. It was later reported that she dies on the operating bed due to her injuries.