A MOON RISE STRONGER THAN ANY UPPER MOON DEMON MUZANS BEST CREATION UPPER MOON ZERO BUT WHO IS THIS NEW UPPERMOON AND HOW STRONG IS THIS NEW DEMON

What if Rimuru went to Demon Slayer as The older brother of Tanjiro and Nezuko and changed the fates of various people

In this au tanjiro has been trained by his father tanjuro to use sun breathing. Tanjiro can use sun breathing 12 forms without any backlash, he does not know the 13th form of sun breathing. Another thing he looks a lot like yoriichi so muzan Jackson is going to have lot of heart attack when he will meet him in this au. The story will be quite similar to cannon timeline only that tanjiro is going to be a prodigy like muichiro tokito. Note English is not my mother tongue so there could be grammatical mistakes in the chapter so I apologized.

The is an alternate hypothetical where tanjiro is a descendant of Yorichii

What would happen if the Dance and the earrings weren't the only things that were given to them by the first sun breather, what would happen if the Kamado family had yoriichi's nichirin blade. But not only that but what would happen if Tanjirou had learned the way of the blade and the dance of the sun at the age of 7.

Taiyo kamado, the reincarnation of Yoriichi, strong enough to take down 2 upper moons. The love of Kanae kocho, and the brother of tanjiro kamado. One day Taiyo came across a demon which slaughtered some people. He wasn't afraid and managed to kill the demon. He was just seven when he went to train with the flame hashira. His training was easy for him and he eventually became stronger than anyone.

Tanjiro comes home to find his entire family dead. He was later found by Giyuu and was sent to Urodaki to train to become a demon slayer. But after he got their he got dreams of someone with hanafuda earrings(Yorrichi) performing a breathing technique he heard him call sun breathing that looked very similar to his family dance. After he told Urodaki about this he immediately told Tanjiro about sun breathing and that only one person was able to do it. After seeing that Tanjiro cam actually use sun breathing he immediately told him to train and train more in this breathing technique. Over the next two years Tanjiro would get the same dreams and has learned how to perform the 12 moves flawlessly and is still training to do the 13 form. Read the first chapter for more information.

My dream was to live a quiet life with my family in a small house where we would sleep side by side. I would be close enough to see the lovely faces of my parents and sibling and close enough to reach out and take their hands. That would have been enough. But even that did not come true. Demons exist in this beautiful world. What if Tanjiro was a hashira ? why did he leaves demon slayer corps ? what happen to his family ? where is nezuko ? why did he beome hashira ? let's find out

(in this Story) tanjiro will be a Tsugikuni not a kamado he will be the desendant of Yorrichi and he will be the reincarnated of Yorrichi as tanjiro will be born with a mark and he and Yorrichi look a like and Nezuko will be alive as she was taken by Kanae and Shinobu (Kanae will be alive in this story) and Tanjiro's personality will be like Yorrichi Quiet and very kind and doesn't talk to much.