The Hashiras would likely show concern. Some, like Shinobu, would immediately start looking into possible medical solutions. Giyuu might be more reserved in his worry but would still keep a close eye on Tanjiro. The other demon slayers would also be affected. They look up to Tanjiro, so his sickness would lower the morale of the group. They would try to support each other while waiting for Tanjiro to recover.
In a more welcoming village, the villagers could be excited to have him. They might see him as a hero because of his reputation in the ninja world. They would ask him for stories about his battles and adventures, and Naruto would be happy to share, creating a friendly and positive atmosphere.
Tanjiro might use his sense of smell to detect hidden threats. Since his sense of smell is super - enhanced, he could sniff out any demons or traps in the way of saving Rengoku. For example, if there are demons disguised as allies, Tanjiro would be able to tell by their scent.
The village would be in shock. Naruto is a hero to them. People would feel a great sense of loss and insecurity. The younger generation, who looked up to Naruto, would be especially disheartened. They might start to question their own future as ninjas.
If Naruto was caught singing fanfiction in the village, there would be a whole range of reactions. The merchants in the village might see it as a new opportunity to create merchandise related to this new 'Naruto - singing - fanfiction' thing. The ninja families might be more concerned about whether this is a sign of Naruto getting distracted from his duties. The children would likely be the most excited, running around and telling everyone about it. The village elders, on the other hand, would probably have a long discussion about whether this is an appropriate behavior for someone of Naruto's standing. But in the end, Naruto's charm and popularity would probably smooth over any major negative reactions.
Some villagers might be shocked and horrified. Naruto has always been seen as a hero, and this act of killing the council would shatter that image for many. They would fear that Naruto has gone rogue and might pose a threat to them.
The villagers' reaction would be a mix of excitement and some concerns. On one hand, Naruto's popularity among the younger ninjas is huge. His friends like Sakura and Shikamaru would be his biggest supporters and help him in his new role. However, some of the more traditional clans might worry that Naruto's unorthodox ways could disrupt the long - established order in the village. But over time, as Naruto shows his ability to balance his unique style with the responsibilities of the Hokage, they'd come around.