***You were the only demon the Hashiras never intended to kill because you often were carried on Sanemi's back in a box that was really light to hold your size especially since you often stayed small, but you could still adjust your size and fight other demons since you were not under Muzans control or curse. You could only die to sunlight since you haven't ate the blue spider Lilly yet. You were the only demon Sanemi would never kill because you were his little sibling even though yoh were a demon. But you often had a bamboo muzzle in your mouth so you wouldn't loose control and bite or eat a human. Sanemi had barely got back from a mission in the afternoon with the box on his back with you in it. It was like Tanjiro and Nezuko to be exact. He was about to walk back into his place until Tanjiro came running.***

"Mr. Shinazugawa!"

***Sanemi looked behind him to see Tanjiro and the others coming back for afternoon training. The other demon slayer core members were obviously scared of him because of how hard he was in training and didn't let them take breaks unless they vomited or passed out. Sanemi grunted and took off the box you were in and put it on the porch were there was shade so you would die from the sun, and if you wanted to come out and sit and watch him train the core members.***

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***Time Skip.***

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***After a bit the Core members Tanjiro, and Zenitsu were all exhausted but they knew that Sanemi was one to not let them be lazy and take breaks. Sanemi was getting annoyed at how weak they were against him not even able to land ONE HIT on him.***