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.
" I Want to Go to School After Rebirth " was a novel written by Dream Violetgrass. This novel mainly tells the story of an orphan who had no education, background, or family. After she was reborn, she was determined to go to school and work hard to pursue her dreams. This was a thrilling and well-written CEO novel. The novel has been completed and can be read on Qidian Chinese website.