Board Thread:General Discussion/@comment-90.184.166.27-20140419175031/@comment-108.46.200.213-20170523174627

Mary: Sean's father was a human and a royal so royals in general are human.

wiki: I f a human produces offspring with a Wesen, the results vary. In the case of a Hexenbiest, the offspring will inherent the ability to  woge. However, due to their nature as hybrids, the offspring will only have a partial woge; certain parts of their bodies will appear woged while others will not. Despite this, the offspring will still have a degree of Wesen powers, as Sean Renard has demonstrated a degree of superhuman strength characteristic of Zauberbiests.

http://grimm.wikia.com/wiki/Hybrid

MaryLikesGrimm