hashira react to their death

Well, several hashira died. For example, Gyomei Himejima sacrificed himself in a fierce battle.

Yes, Tanjiro eventually becomes a Hashira in the manga after going through many challenging battles and growth.

Not all of them died. Some Hashira managed to survive until the end of the manga.

Inosuke doesn't become a Hashira in the manga. The story progresses with him having other significant experiences and achievements instead of achieving that specific position.

It's hard to give an exact number. Different story arcs and battles led to the deaths of multiple hashira. Some died heroically, while others met their fate in unexpected ways. The count changes as the manga progresses.

Yes, she does. But it happens under specific circumstances and for particular reasons related to the plot.

Definitely not. Genya remains outside the ranks of Hashira throughout the manga. This is because of a combination of factors such as his skills, experiences, and the overall direction of the story.

The world would be in shock. The media would be filled with reports of his death. Civilians who had always seen him as a symbol of safety would feel vulnerable. There would be mass mourning in the cities he had protected.

Ryuk would probably just be amused. He is a Shinigami who has seen a lot in his existence. Fanfiction is just another strange human creation to him. He might chuckle at some of the more outlandish ideas in the fanfictions, like a character having superpowers beyond the Death Note.

The deaths of demon slayer hashira in the manga are often intense and emotionally charged. They're depicted with great detail and have a significant impact on the story.