There are some characters, that when one actually thinks about it, they are better than the main character of the Movie. I stand to believe this, and I happened to see it in the Anime Naruto. Don't get me wrong though, I measured this characters not by their power level, nor by their backstory, but probably on their acts in the series I guess. The o ly Character I would be talking about though, is the famous known Itachi. This dude acted as a brother, not only to his blood but also to Naruto and the entirety of the Village. One might say that the only reason he is tailing Naruto is because of the objective of the organization he is in, that is, the Akatsuki, but I find it more deepening than that. No one would tail someone who is not your blood, and give a heartwarming smile, after knowing that, that person is now stronger than he/she was a day before...
“Naruto: Characters That Are Irredeemable - GameRant”
https://gamerant.com/naruto-characters-irredeemable/
“Naruto: Characters That Are Irredeemable - GameRant”
https://gamerant.com/naruto-characters-irredeemable/