The real Edwin Grosse is an elderly man who works in Area 5.1. However, during Grosse Encounters, he was impersonated by a KORPS agent, whose real name is unknown.
The fake Edwin Grosse was the head of KLAVIKLE at KORPS. He impersonated Edwin Grosse in order to retrieve the black box of a fallen satellite. The team outwit him, once they realise that he's an impostor, resulting in over 120 KORPS agents being ambushed during their attacks. The Crime Minister has him taken away for his failure.