Board Thread:General Discussion/@comment-24467102-20140216201856/@comment-80.245.147.81-20140217094345

Apart from eyebrows naturally being darker in a lot of cases, coloring eyebrows of course goes both ways - yellow or dark.

That said, considering the fancy and care Yang has for her hair - to put it mildly - it's not beyond imagination that she colored  it.

That again does not necessarily prove anything with respect to blood relation.