Board Thread:Off Topic/@comment-25396609-20160125214134/@comment-26397825-20161113032419

Honestly? Probbaly not. The only indication we'd gotten of a Grimm 'possessing' something is the Manga.

But that's why we like new episodes, isn't it? It opens up new possibilities and lets us know more about the world and what is and isn't within the bounds of reason for the world.