Board Thread:Speculation House/@comment-68.150.42.56-20140111071941/@comment-3257939-20140114021432

In anime, that's a classic, meaning it's always possible. For humans to transform into Grimm, "Grimmification" and become extremely powerful.

But if we find out why Ruby and Yang have different surnames, that would bring out a lot of theories about who is Summer Rose and the Woman in the picture. For example, if Ruby and Yang have the same father but different mothers, the woman could be Yang's mother while Ruby is looking for her own mother, Summer Rose.