Esparia
If you are the only one to remember something, did it still happen? Time travel doesn't always work the first time, it doesn't even always work the second time; Naruto knows this well. Rewriting events, time looping, going back to live through your childhood again (and losing a small part of your sanity along the way) is a small price to pay to avoid the end of the world...if he ever succeeds, that is. Thankfully, he's not as alone in this adventure as he assumes.