Well, Naruto would likely be one of them. He has a big heart and would surely want to help his fellow villagers. Sakura could also be involved as she is a skilled medical ninja. She could use her medical knowledge to diagnose and treat their illness.
Another interesting one is 'Kotetsu's Training Days'. This fanfiction delves deep into Kotetsu's training regime. It shows how he overcomes difficulties, learns new jutsu, and forges strong bonds with his training partners. It gives a great insight into his character development.
One great 'naruto kotetsu fanfic' is 'Kotetsu's Journey'. It really delves into Kotetsu's character, showing his growth from a relatively unknown shinobi to someone with a more significant role. It has a great plot that weaves in with the main Naruto storyline in an interesting way.