Board Thread:Speculation House/@comment-4606441-20141024012020/@comment-129.15.131.114-20141024043747

Regarding the Grimm mask, it might not mean she's a faunus. It might just be a sort of trophy of a wild woman who lives outside the protection of the kingdom fighting Grimm as a Vigilante. That could fit with Yang's mother not being seen by anyone for a long time if she secluded herself outside the kingdoms.