The Infinite Tsukuyomi does not affect Hashirama, Tobirama, Hiruzen and Minato because they are reanimated. Hagoromo, the Sage of the Six Paths, appears and explains to the four that Hashirama and Madara are the reincarnations of his sons Ashura and Indra. Hagoromo recounts the tale of how he founded Ninshu, the Ninja Creed, and about the lives of Ashura and Indra.
my mother's third son
who possessed Madara.
الابن الثالث لوالدتي الذي استحوذ على مادارا
dem dritten Sohn meiner Mutter,
der Madara für seine Zwecke manipuliert hatte.
de nombre Zetsu,
para que actuase siguiendo su voluntad.
el llamado Zetsu, para que 
actuase siguiendo su voluntad.
il terzo figlio di mia madre, 
colui che ha soggiogato Madara.
o terceiro filho da minha mãe, 
que possuiu o Madara.