User blog comment:Samuelshadow16/Are Ruby and Yang Blood Related/@comment-97.95.138.90-20130929111629/@comment-3146930-20130929124727

No one ever said they were adopted, but I thought I heard someone say that at the very least they weren't full sisters. This could mean they are half-sisters, step-sisters, or who knows, maybe they are full sisters and their mother's last name was originally Long and their father's name is Rose (or vice versa). Then they split up and Ruby kept the name Rose and Yang kept the name Long.