hashira parents react to them

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

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.

If parents come across disturbing content in Descendants fanfiction, they should immediately stop watching it. They can also report the content to the platform where they found it if possible.

Parents can react with understanding. They should create an open environment where the teen feels comfortable to talk. For example, instead of getting angry immediately, they can listen to the teen's feelings and experiences.

Quite a few. Some of the notable Hashira who died include Gyomei Himejima and Shinobu Kocho.

It starts around chapter [X]. But the exact point might vary depending on different translations and editions.