The son of the demon king

A new figure

Tanjiro looked through the lenses of a microscope, he saw blood cells as he picked up a needle and proceeded to inject it into the cell, a blue substance was injected into the blood cell as its darkish red color disappeared

"Yes yes!"

Tanjiro shouted in excitement but then a few seconds later the blood cell returned back into a infected demon, tanjiro let out a heavy sighed and leaning back on his chair

"Fuck.......I need better blood samples.......someone more stronger....."

Then tanjiro stood up and laying on his bed which he set up across the room he was in. Laying tanjiro was disappointed by the experiment on creating the cure for demons

Tanjiro knew who's blood he had to get next but knew it might jeopardize his cover on being a new mysterious figure, tanjiro pulled the covers deciding to sleep in early

Demon slayer HQ

Shinobu sat quietly putting on her usual smile, she alongside the other hashira gotten reports of upper moon 6 fighting a mysterious figure in a city. She and the hashira sat in front of ubayashiki

"Well I find it quite strange, who could possibly fight upper moon 6 and survive?"

Mitsuri asked a bit concern about this mysterious figure, the hashira had already been tired out from killing hordes of demons over the last months after tanjiro's betrayal and it only added more to their plates

"We don't know yet, but from the witnesses reports was that they used a breathing technique unknown to us. The reports stated it looked like flames but apparently was more stronger"
"Hmmm.....strange indeed, anything else from the reports?"
"Why yes, the witnesses said the mysterious figure seems to be in his teenage years, probably 16 to 17 and they said they heard him yell 'clear blue sky' "
"Sounds fascinating! Wish I could meet the young man!"
"Well that is everything today, thank you for coming my children"

The hashira said their goodbyes and left to their respective estates as Shinobu walked back to her estate and immediately heard loud grunting, she investigated to see Zenitsu and Inosuke lifting boulders the size of their legs

"Come on! Your almost there Inosuke!"
"Shut up! I don't need your praise!"
"Oh, then I guess you don't need me cheering you on?"

Zenitsu then slowly walked away as Inosuke looked back and fourth before yelling

"Fine! Cheer me on!"

Zenitsu grinned as he and Inosuke continued to train, they had worked hard and had perfected their breathing technique's and now at rank Kinoe the highest rank just below hashira

Shinobu smiled seeing them determined to be strong, at least they were still looking into the future unlike how mostly everyone was. She then walked into her estate and go into her room to rest because she needed some rest after going out for months hunting demons

With tanjiro

Tanjiro had tracked the movements of one of his uncles by following his scent and locating him to a small village. Tanjiro used his stealth to move in the dark of night and black clothing to sneakily watch his uncle

Peaking over a roof tanjiro heard screaming and then going dead silence as he saw upper moon 5 or to tanjiro uncle gyo, tanjiro mentally prepared himself to hurt another member of his family

Tanjiro hopped over the roof onto the ground and tip-toed towards his uncle who was distracted by making another one of his 'art' and repeatedly telling the man to be quiet

"Sshhhh, am trying to concentrate......"

Gyokko said to the screaming man who he was making into a ball, tanjiro unsheathed his sword and breathed in feeling his lungs grow warm