Board Thread:Theories and Speculation/@comment-30736821-20170426173032/@comment-32196880-20170625170041

I believe Kawaki belongs to the Senju clan, because look at his hairstyle, it has a strong resemblance to the hairstyle of Hashirama and Tobirama Senju's younger brother Itama Senju with two toned hair. I think he is a descendant of Tobirama, because as far as i know, Tsunade doesn't have any children of her own.