Board Thread:General Grimm Discussion/@comment-24.150.82.174-20150425033528/@comment-24264679-20170409174304

108.46.200.213 wrote: Kouf is saying that Kelly Nick's son is part of the blood-of-your-ancestors-and-strength-of-your-family thing which is  only referring to grimms (see below).

Marie and Kelly tell Nick in "The End" that "The strength of your blood, the blood of your Grimm ancestors" we can defeat evil.

http://www.springfieldspringfield.co.uk/view_episode_scripts.php?tv-show=grimm&episode=s06e13

KOUF:   But we also really wanted someone to tell us, “This is not a myth, a legend, or a fairy tale. This really happened.” And it seemed like the person to say that would be his son: “Because my father told me so.” And it also wrapped up the whole blood-of-your-ancestors-and-strength-of-your-family thing, as well.

MaryLikesGrimm

Where is it explictly stated or shown? If you have to do any inferring or assumptions than it isn't 100% fact. I can infer that Kelly is half Zauberbiest because Adalind is a Hexenbiest. We know from Renard that only 1 parent needs to be a Hexenbiest for this to happen. But I would be infering because it wasn't stated no matter how much my facts add up.