Is it possible that So6P is orginally from the Uzumaki clan? That could be the reason why the 1st and the land of fire got along so well with the the Uzumaki and the land of Eddies. Kushina did say that 'the shinobi of the senju clan of the hidden leaf and the shinobi of the Uzumaki clan of the hidden Eddy were distant blood reletives'. The Uzumakis lived long and they specialized in sealing. I also don't think its a coincidence that the rinnigan awoke in nagato, who is also an Uzumaki.
Any thoughts?
Any thoughts?