The four previous Hokages had been reanimated and reincarnated by Orochimaru himself. They were reincarnated for a necessary purpose though.

The Legends of Konohakagure stood before you as Orochimaru explained that he brought them back from the dead because Madara was bringing a war this way.

Hashirama, Hiruzen and Minato carefully listened as to why they were brought back to the land of the living. All of them having different reactions to this sudden news..

Minato looked over at you from time to time, getting a good feel for your chakra. You definitely weren’t a past hokage and you weren’t the current hokage. So who were you..?

While Tobirama was more focused on you, he kept his eyes glued to your movements as Orochimaru was explaining.

He could tell you’d been reincarnated as well but your aura was completely different then theirs. Your charka was completely different as well. You seemed outdated.

Like you’d been dead for much longer than any of them.

But Tobirama choose not to bring it up just yet. Not while Orochimaru was explaining why he’d just reincarnated them.