Board Thread:Speculation House/@comment-68.186.83.101-20130601225528/@comment-50.160.154.148-20131231054254

Here's my theory on why they have different names and how they're sisters, blood-related, and not adopted:

Mr. Xao Long had a child (Yang) with Ms. Xao Long and they either devorced or broke up (depending on the relationship) some time (less than 2 yrs) later leaving Yang in the care of Mr. Xao Long. Sometime after that (less than 1 yr) Mr. Xao Long met, dated, and possibly married Ms. Rose and gave birth to Ruby. Ms. Rose died a short while after that due to either the Grimm, an incurable disease, giving birth, or a sudden accident (Grimm is most likely the cause of death). Now for the mother, Mr. Xao Long either married another women, remarried Ms. Xao Long, or is a single father raising 2 girls.