All three genin froze at the terrifying sight of Zabuza Momochi the missing-nin before their mentor, Kakashi Hatake, got captured in Zabuza's water prison jutsu.

Source: https://www.cbr.com/naruto-uzumaki-best-fights-growth-as-hero/

Combining the two powers, Kakashi awoke the Full-Body Susanoo which could even combat Kaguya Otsutsuki.

Source: https://www.cbr.com/naruto-susanoo-users-ranked/

Despite his rivalry with Kakashi, Obito had no darkness in his heart until Madara saved him from the collapse.

Source: https://www.cbr.com/naruto-madara-best-quotes/

His reunion with Rin is unpleasant and devastating, as he's forced to watch Kakashi kill her for what seems to be no reason.

Source: https://www.cbr.com/naruto-saddest-character-deaths-ranked/

However, Kakashi soon proved himself the best mentor for this group of bold ninjas.

Source: https://www.cbr.com/naruto-kakashi-best-lines-quotes/

If it wasn't for Kakashi, they wouldn't even have had a fighting chance against Zabuza, especially with Haku in the equation.

Source: https://www.cbr.com/naruto-sasuke-rivalry-explained/

In this regard, Kakashi did a better job of managing both the lighter and darker sides of being Hokage, as he was clever, calculating, and willing to make harsh decisions when necessary.

Source: https://gamerant.com/naruto-who-was-the-most-intelligent-hokage/

Kakashi has been a fan-favorite character since began.

Source: https://screenrant.com/naruto-jjk-gojo-satoru-inspiration-anime-manga/

Kakashi Hatake broke it up, then bound Sasuke to a tree and tried to talk Sasuke out of losing himself to hatred and grief.

Source: https://www.cbr.com/dark-naruto-moments/

Ultimately, Kakashi is finally able to show how he has changed and grown in the years since his tenure as Team 7's mentor (rubbing off on Guy as well) by taking an active interest in Mirai's well-being.

Source: https://www.cbr.com/naruto-steam-ninja-scrolls-kakashi-parenting-problem/