Konoha: Reincarnated by Orochimaru at the Start

System, multiple identities-a story about a ninja with a few screws loose, accidentally brought back by Orochimaru's Impure World Reincarnation, and the chaos he causes.

P.S. Expect mild horror later on. The protagonist isn't alive, and most of what he does is just for kicks. Every loose plot thread will be tied up.

Uchiha Gen: "What's there to be scared of? I'm already dead anyway."

"Itachi, address me as your ancestor."

...Amaterasu!

"Holy shit, this stuff won't go out! You're actually serious!"

Konan: "Nagato?"

"Huh? What 'Long Gate'? I only know how to close gates." Gen plays dumb.

P.S. I don't like Boruto, so please don't apply Boruto's lore here. Thanks. (There aren't a bunch of conspiracy theories-Kishimoto's established lore is taken as it is.)