Janet van Dyne was a client of Heroes for Hire.
Janet van Dyne was a professional musician in New York being haunted by Zumaru who intended to possess her. Despite Heroes for Hire's efforts, Zumaru was successful in possessing her before seeking out her lover Rorkannu to summon Umar to Earth.
After being freed from Zumaru's possession, she started having a relationship with Hank Pym. The two would later have a son, Henry Pym Jr.