A Cook, A Doctor, A Ghost and A Ronin.

Hashira Training

Butterfly Mansion

Tanjiro dons the default Demon Slayer Corps uniform that has a kanji of 'destroy' sewn on the back of the uniform which he added his signature dark green and black checkered haori. He had finally fully recovered from his serious injuries before. Thanks to the genius surgeon, who could made impossible things possible.

Some thought that it was a miracle, how Tanjiro recovered from such serious injuries in a matter of few days which bewildered them. With Tanjiro's injuries, he should not even be able to walk again, but he did. Tanjiro doesn't care what others say, he is just thankful that he managed to be discharged. He can't even imagine staying one more day inside, being forced to take hundreds of pills a day. Maybe that's why he recovered so quickly. Who knows? 

There's a time that Tanjiro is really curious with Law's strange abilities. But he didn't want to ask, considering that the surgeon is really scary at times. Now, he could finally left the Butterfly Mansion. He was about to leave the mansion.

"Goto-san, thank you for taking care of me all this time while I was here!" Tanjiro bow down slightly with a grateful smile for everything that Goto has ever done while he was admitted.

"Don't thank me. I just did what I had to do." Goto replied. He just did what Law instruct him to do which he follows obediently without any complaints whatsoever. 

But before Tanjiro could leave, a man wearing a Hyottoko mask and  sunflower-patterned haori and has his head wrapped in a spotted head scarf. It was Haganezuka, who visited Tanjiro. The boy is happy that the swordsmith visited him, even though its a little late.

"Ah! Haganezuka-san! How are your wounds! Are they healed?" Tanjiro asked Haganezuka if he his injuries were healed. Haganezuka didn't reply. Instead, he kept on breathing heavily and he seems to be looking out of breath.

"Huff! Huff! Huff! Huff!" Haganezuka just keep on breathing heavily.

"No? You aren't all right?!" Tanjiro could see that Haganezuka still didn't recover from his injuries before. He looks weak and with his raggedy breath, it was obvious. Haganezuka handed the young boy a katana. Which is the finished product that the boy got from Yorichii Type Zero.

"Ooh! A katana! Thanks!" Tanjiro received the katana. Looks like Haganezuka managed to polish the katana and furnished it making the katana looks brand new. 

Goto took a nearby chair and presented it to Haganezuka. "Please, take a seat. Are you all right?" Goto insisted. Haganezuka nodded and take a seat.

"Bl-Huff! Huff! Blad-Huff! Blade! Huff!" Haganezuka, who is still breathing out of rhythm told Tanjiro to unsheathe the sword.

"The blade? Let me look." Tanjiro unsheathed his brand new, polished sword. Tanjiro is stunned by the end results of the blade. It was beautiful, unlike when he first found the sword which is rusted. There's a kanji engraved for "Destroy".

"Whoa! Incredible! The black color is even deeper! This is amazing!" Tanjiro praised. Hanagezuka unknowingly smirked beneath the Hyottoko mask. He's glad that it suited the boy's liking.

"The steel and quality are exceptional. So the former bearer must have been a strong swordsman" Haganezuka explained.

"What's the kanji here for?" Tanjiro asked Haganezuka.

"The swordsmith who forged this katana made it for destroying all demons. He didn't engrave his name or anything else, just that single character. The ranking system begin later and only the Hashira receive swords engraved with 'Akkimessatsu' " Haganezuka explained wholeheartedly. 

"Really? What an incredible weapon.." Tanjiro's eyes widened when he learned about the history behind the kanji engraved on the sword. It's a literal treasure he just uncovered.

"Although I am even more curious about the Ronin's sword. The quality of his swords are incomparable! I have never seen such a sword before!" Haganezuka wonder if the Ronin let him inspect the sword.

"But when I used this sword in the fight before, I didn't see the character on it." Tanjiro asks why did he haven't seen the character before.

"That's because it had only be polished to the first stage. But you guys took it and used it! It was still a little rusty! I wanted to kill you!" Haganezuka's temper suddenly flares up in anger.

"S-sorry!" Tanjiro apologized. Even though he remembered the one who tossed the blade was Ronin in the first place.

*Krang!*

But before Haganezuka could scold Tanjiro even further, a young, muscular figure wearing a boar mask crashed through the window, scattering the glass everywhere on the floor. Goto almost got a heart attack from that. 

"Ahhhhhh! Inosuke! What are you doing?! You broke the window!" Tanjiro shouted, shocked at Inosuke's actions running through a window.

"Are you stupid?! Kocho-sama will kill you!" Goto smacked the idiotic boar head. He's going to get in so much trouble for this.

"Stronger! Stronger! Stronger! Group strength training starts now!" Inosuke exclaimed.

"Eh? Can you repeat that?" Tanjiro asked if Inosuke could repeat what he just said.

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The special training had began. It was called Hashira Training. Those ranked lower than a Hashira trained with them, one after another. Hashira usually didn't train anyone but their Tsuguko protegees simply because they were too busy. 

In addition to providing security for large regions, the Hashiras had many other responsibilities, including gathering information on demons and training to further improve their own skills. However, after Nezuko conquered the sun, demon appearances stopped completely. It was like the calm before the storm. The Hashira could do their own training at night and focus on training on the day.