Board Thread:Poll Archive/@comment-24095889-20140415141927/@comment-53539-20180228093600

221.126.227.67 wrote: I think that Kagamine Len is a big brother and Kagamine Rin is a younger sister ; since their ever - popular song in my opinion is none other than Childish War (Okochama Sensou) where it shows their brother - sister rivalry for each other >^< Rin is the eldest. She was conceived and completed before Len.