Board Thread:Episode Discussion/@comment-33188476-20160321205004/@comment-5141248-20160419002406

If the show continues for a couple more seasons, it would not surprise me if Kelley is 100% Grimm. I suspect Diana and Kelley's introduction to one another will be eventful, since Diana has the power to see people for who they really are (like that poor guy in the helicopter), but she had no fear of Nick's mom. Maybe she's reading minds or can feel the vibe of the people around her.

There's also another angle to look at. Adalind only started to get her powers back after Kelley was born. Could Kelley (if Grimm) have supressed her powers?