Sergeant Drew Wu

Sergeant Dre Wu is one of the protagonists of the serire Grimm

At first he didn't know anything about the secret of Nick because he didn't see what he see, because all the criminal he arrest or died by the hand of Nick seem to be humans at his eye at first. He doesn't know now that hank see what Nick see, because like the other season he didn't the people change and don't know that his two friends see them.

but when the seasons go Wu now see the strange things that his friends see, and they tell him all he saw was real and finally became part of their quest against evil Wesens, but during one of the mission he got attacked by a Blutbad who just muted and scratched, so he became a wesen, but a primal one who change at the emotion that he feel.