hashiras react to rap de tanjiro demon king

No, Tanjiro isn't a demon. He's a human determined to save his sister Nezuko, who turned into a demon.

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.

Yes, Tanjiro does turn into a demon in the manga.

No, Tanjiro doesn't become a demon in the manga. He remains a determined human fighting against demons.

No, Tanjiro doesn't become a demon in the manga. He remains a determined and righteous human fighting against demons.

Some of the hashiras who died in the manga include Gyomei Himejima and Muichiro Tokito.

Tanjiro remains alive in the Demon Slayer manga. The story has him overcome many challenges and continue his journey without meeting a fatal end.

I think it's in 'Demon Slayer: Kimetsu no Yaiba' manga. But the circumstances around it are quite complex.

If Tanjiro becomes a demon in fanfiction, he might lose his sense of humanity. His relationships with his friends and family would be severely strained. For example, his sister Nezuko, who is also a demon, might be affected in unexpected ways. He could struggle with his newfound bloodlust and the need to consume humans, which goes against his original kind - hearted nature.

I'm not sure exactly. You might have to go through the manga carefully to find out.