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.
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.
Many people also like to talk about sad stories. They share their feelings with friends or family, discussing what made the story so sad and how the characters could have had different outcomes. This sharing helps them process their emotions and also creates a sense of connection with others who might have similar reactions.