Polar Opposites
Light and Dark. Good and Evil. Order and chaos. Yin and Yang. They were each other's exact opposites, yet the fit together perfectly, working as one cohesive unit.
They were Zetsu, and for all they were different they had one thing in common, only they knew the truth.
The truth about the Infinite Tsukuyomi, about the Uchiha and the Senju. About the ancient histories lost in the passages of tim, the stories of Kaguya and her son's, Hagoromo and Hamura.
And this was how those facts had remained such a huge secret for so long. after all, what better way to hide something than to only tell those who were loath to speak to one another?