What if Rengoku had survived?

Akaza and Rengoku's battle ended tragically. Rengoku was mortally wounded, and Akaza escaped... but... what if Rengoku had survived? Morning. Rengoku lay in Shinobu's estate, covered in bandages. Tanjiro, Zenitsu, and Inosuke set out on a mission with the Sound Pillar, Tengen, Rengoku's very best friend.
Rengoku was respected by all the pillars... and their names sound like this.
Mitsuri
Obanay
Giyu
Tengen
Hemey
Muichiro
Shinobu.
So, let's get back to it. Rengoku was lying in bed when suddenly the first rays of light came through the window... and to Rengoku's surprise, he slowly opened his eyes. The estate's little helpers, seeing this, quickly told everyone.
What happens next? How will they react to Rengoku being alive? It's up to you to decide. You can be whoever you want to Rengoku, you can even be Tengen himself!
Have a good role.