hashira react to tanjiro as luffy

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

The Hashiras would likely show concern. Some, like Shinobu, would immediately start looking into possible medical solutions. Giyuu might be more reserved in his worry but would still keep a close eye on Tanjiro. The other demon slayers would also be affected. They look up to Tanjiro, so his sickness would lower the morale of the group. They would try to support each other while waiting for Tanjiro to recover.

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

Luffy would be extremely angry and sad at the same time. He might roar out in pain and frustration.

Zoro would be deeply affected. He has sworn to follow Luffy and his death would be a huge blow. He might feel like he failed in his duty to protect the captain. He would likely become more withdrawn at first, but then focus on getting stronger to avenge Luffy if there was someone to blame for his death.

Nami might be shocked at first. She'd probably look at Luffy with wide eyes, not believing what she just heard. After all, Luffy is not the most romantic or traditional suitor.

Nami would be inconsolable at first. Luffy has always been there to protect her, and his sudden death would leave a huge void in her life. She would probably cry for days. As time passed, she would remember all the things Luffy taught her about courage and believing in oneself. Nami would start to take on some of Luffy's leadership qualities in a way. She would be more outspoken about her plans for the crew and more determined to see their dreams through. She would also keep Luffy's memory alive by telling stories of his adventures and his selfless acts to new people they meet on their journey.

Tanjiro was the main character in the manga "Ghost Destroyer Blade" and its derivative works. He was born in Mount Untori, Okutama Prefecture, Tokyo. He was 165cm tall and weighed 61kg. He liked to eat Chinese toon and senbei. He was originally the eldest son of the family that sold charcoal. His family was killed by a ghost on his way back from selling charcoal. Only his sister Mi Douzi survived but became a ghost. This prompted him to join the Ghost Killer Team under the recommendation of Tomioka Yoshio. His goal was to save his sister Mi-do and find the ghost that killed his family to take revenge. Under the guidance of Lin Taki, he learned the basic sword form of the Breath of Water. He also inherited the family's "Fire God's Divine Music Dance"(a form of the Breath of the Sun), and gradually integrated it into his sword skills to form a unique combat style. In the final battle of Limitless City, he and his companions fought against Ghost Dance Shi Wupeng and his subordinates Ghost Moon, and finally defeated Wupeng with the Ghost Killing Team. After the battle in Limitless City, he fell into a coma due to his injuries. After treatment, he woke up and lived a peaceful life with his sister Mi Doudou. He also developed feelings for Butterfly Kauna, a member of the Ghost Killing Team, and married her. He also won the first place in the popularity poll of the first Ghost Destroyer Blade. Tanjiro in the animation was voiced by Natsuki Hanae (Japan, adult), Satoshi Sato (Japan, juvenile), Kyuugawa Koshiyama (Japan, juvenile), Aligra Clark (English), Renato Novara (Italian), and Star Tide (Chinese).

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.