Who Ya Gonna Call - shinzo is Janine Melnitz - exceptionally in her RGB secretary outfit instead of her uniform with protonpack! ;) and modellbaubert is Egon Spengler :D Photo + Edit:
Janine Melnitz - Wikipedia
Jersey Shore Comic Book Show November 16, 2014 | Ghostbusters NJ
Adult Janine Costume - The Real Ghostbusters - Spencer's