The twin swords of equal value

The hashiras of the demon slayer corps were the strongest swordsman that the organization had they were the pillars of power in the demon slayer corps.

They consist of 9 powerful individuals which are

The stone pillar gyomei himejima
The wind pillar sanemi shinuzigawa
The flame pillar kyojuro rengoku
The water pillar giyuu tomioka
The snake pillar obanai iguro
The mist pillar muichiro tokito
The sound pillar tengen uzui
The love pillar mitsuri kanroji
The insect pillar shinobu kocho

But what if there was a 10th pillar which were only known by a couple of people in the demon slayer corps a pillar that has faced some of the most powerful demons including the most powerful upper moon and survived to tell the tale and that person is you (Y/N) Tsugikuni the son of (F/N) Tsugikuni (M/N) Tsugikuni ,who will be the pillar of yin and yang who managed to be able to combine the breath of the sun and the breath of the moon creating the breath of balance.

I do not own any of the characters that are from the original story of demon slayer (kimetsu no yaiba) that was made by koyoharu Gotouge, i also do not own any of the art or pictures that will be in the future for this story. I only own the breath of balance along with (Y/N) and his family