Kelly - As what the end already made it to be, he is a Grimm however there its also more than likely that he is also a Half Zauberbeist.  Just look at Rennard, his mom is a Hexenbeist but the father is human.  So needless to say would only make sense for Kelly to be similar as Rennard as a minimum, definately more.

They for sure can expand more, but the challenge is that with Kelly and Diana plus the Big Stick, they are pretty much unstoppable!

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