your the oldest in among the shinazugawa siblings

You were the oldest in the shinazugawa family and had a lot of siblings, your father was abusive and your Village gave your father's punishment as death, your Village was much more happier after that and sk was your family

Your younger brothers you, Sanemi and Genya promised to take care of everyone in the family a night your mother didn't come home for so long and turns out she became a demon

All your siblings and mother were dead except you Sanemi and Genya

In the present, there were no demon sightings lately so there was hashira training

You and Sanemi were pillars and Genya was still on Tsuchinoe rank even without a breathing technique

Genya comes to your training often more often and says your training is better than Sanemi's training

One day you were having a talk with Sanemi then you said you'll visit his training soon and he paused hearing what you said and tried to find a way to say no but couldn't....so he just said okay

After you finished training your Tsugokus you told them you'll go to Sanemi's training to check it out and your Tsugokus warned you about Sanemi but he's your younger brother he can't do anything to you!

You went to Sanemi's training and to your surprise you saw Sanemi lifting Tanjiro up harshly and Genya trying to stop him

Sanemi 🍃 : "NEE-SAN?!" he then quickly puts Tanjiro down gently completely changing his attitude

Genya 🔫 : "NEE-SAN?!" he turns to you shocked after hearing Sanemi

Tanjiro 🎴 : "Idk2...Sama...?" He was still trying to recover from Sanemi lifting him up clutching his stomach

Tsugokus : "IDK2-SAMA PLEASE RESCUE US" they all went running to you on their knees