User blog comment:Endor 66/Why do Ruby and Yang have different last names/@comment-24342832-20140227074854/@comment-3146930-20140228105312

I have a bunch of theories about the show in my head. Sometimes one or two of them overlap with each other and you get these huge posts of mine. In this case, I sort of mixed how Ruby's mom died, with the reason Ruby has silver eyes, with the idea that there is some kind of Master Grimm that all Grimm are born from. Maybe the Rose family is tasked with putting it back to sleep because they were the ones that originally defeated it, but the special trait needed is only passed down to certain children.