hashira reacts to one piece

Well, they might be really surprised by the unique and wild world of One Piece. The RWBY characters are used to their own world with Grimm and Dust, while One Piece has Devil Fruits and the Grand Line. They could be shocked by the powers of the Straw Hat Pirates like Luffy's stretching ability. Maybe they'd be inspired by the strong bonds between the One Piece characters, which could make them reflect on their own relationships in RWBY.

The RWBY characters' opinions would vary greatly. Ruby, as the team's eager beaver, would be all in for the One Piece fanfiction. She'd be like a kid in a candy store, loving every new discovery. Weiss, being a bit of a snob sometimes, would have a more measured approach. She might nitpick about things like the logic of Devil Fruits or the pirates' lack of proper decorum. Blake would find kinship in the outcasts and rebels in One Piece, and her views would be colored by that. Yang would be the one shouting at the page during the intense fight scenes, really getting into the action. So, in summary, their reactions are as different as their personalities.

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

Some people might scream or jump when they react to scary stories. It's a natural response to sudden fear.

One way to analyze it is by looking at the emotional response it elicits. If it makes the reader feel angry about the injustices of the war, or sympathetic towards the characters, that's an important aspect. For example, a fanfic that focuses on the plight of civilians during WW2 might make the reader feel deep sympathy.

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.