hashiras react to tanjiro and inosuke first kiss

No, they don't. There's no such scene in the manga.

Their friends would probably be really happy. After all, Dom and Letty are like the power couple in their group. The guys would be high - fiving Dom, while the girls would be giggling and hugging Letty. They might even plan a big celebration for them.

Some of the hashiras who died in the manga include Gyomei Himejima and Muichiro Tokito.

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.

He could be in a state of disbelief. Maybe he just stands there for a moment, his mind racing with thoughts about what just happened. He might be overjoyed but also a bit scared of what this means for their relationship.

No, Inosuke isn't dead in the manga. He's still alive and kicking in the story.

Some of their friends might be really excited for them. They could be secretly hoping for this to happen for a long time and when they find out, they give big hugs and congratulations.

Chichi would be very shy and excited. She has loved Goku for a long time, so getting that first kiss would be like a dream come true. She might blush and stammer a bit, not knowing what to say. Goku, on the other hand, would be a bit confused at first. But then he would feel a warm feeling inside and realize that he really cares for Chichi in a special way.

Well, their friends could also play a role in bringing them together for the kiss. For example, they might set up a special date - like - like a picnic or something. And when the kiss finally happens, their friends would be overjoyed, cheering and maybe even planning a celebration for the new couple.

The more perceptive friends like Batman might notice the change in their dynamic right away. He'd probably keep an eye on them to make sure it doesn't interfere with their work as heroes. Others like Aqualad might be a bit surprised at first, but then be happy for them. He'd understand that their relationship could bring out the best in both of them.