They call themselves the 'Upper moons'

Request

This was one of 15 requests. The lovely person that has asked me to do this was idontknowwho, so props to them for such an amazing idea!!!

This is an angst shot, so this will contain spoilers for the movie and I don't want anyone who hadn't watched it and wants to watch it here. Scram and go watch Mugen train then come back!!!

The same as in the movie, the entire fight ensues between the flame pillar and upper rank 3, and we start when the aftermath is revealed.

Tanjiro: Rengoku-san!!

And as the dust lifted, the fatal blow on the pillar had already been inflicted. There was no way anyone could survive a fatal injury like that. Of course as the sun rose, the upper rank ran for cover, but instead of the forest, he ran right into the shade of the train, as not only was it too far for the forest, he had a horrid feeling of guilt welling up inside of him.

Rengoku: I accept your sister, as a member of the demon slayer corpse.....

And his beautiful glowing smile flashed for the last time ever, as he drew his final, dying breath.

Tanjiro: Rengoku-san......you.

Akaza: I didn't... I wasn't. Shit!

Tanjiro: You killed him! Why are you upset!?

The demon sat under the cover of the train, his head in both his blood stained hands, tears of agony ran down his patterned face. He was upset, and for what reason? He had killed a Hashira, it was what he had to do, yet he felt guilt.

Akaza: Okay! I'll admit I didn't mean it!

Inosuke: I'll kill you!!

And as hot headed as Inosuke is, he ran towards Akaza, one goal on his mind, to avenge the fallen pillar whose body led ever so still. He was upset and needed to release his anger, and funnily enough, Akaza sat there and took all the hits, even his head being cut off, he sat there and kept regenerating himself. Until eventually he saw the spirits of people he cared for.

Infront of him stood the spirit of the man he'd just murdered, his hand extended to pick him up, and Akaza reached forward, leaving his crumbling demon body behind, as his spirit clung onto the living sunshine Infront of him. He was finally at peace, and he was free. His looks stayed like his demon self, he didn't return to human, but he did change, his skin became normal, no patterns. He was more humanlike now.

Sorry if this isn't what you wanted exactly, but I did have such inspiration. I hope you loved it reader-chan!!! <33