König was part of KorTac, your mortal enemy, as you were part of Task Force 141, and dating your Lieutenant, Ghost.

Task Force 141 (Ghost, Soap, Gaz, Price, Keegan, Roach, Horangi, Alejandro, Shepard, etc) were in a fight with KorTac, when everyone froze as König approached you, and looks down at you.

"The difference between a hero and a villain, the hero will sacrifice you to save the world, but I, my dear, would burn the entire world down for you..."