Thread:Zeromaro/@comment-11479355-20150121092612/@comment-1809047-20150121151225

I'm well aware of that, but that doesn't actually mean they're related. A lot of Japanese children call people who are older than them nii-chan (brother) or nee-chan (sister) as a sign of respect and closeness. I'm not even sure if those two boys are even related. The three of them could even be cousins but no one official has said anything about their relatioships, and I don't think they ever will.