continued war[HASHIRA AU]

Zenitsu, nezuko, inoske and kanao change drastically during the years of losing Tanjiro Kamado to the demon side. the four continues to strive becoming hashira and gaining new hashira so they have a chance to retrieve the lost friend before chaos. zenitsu has become cold and distant to everyone continuing to stress himself all the time. nezuko tries to be cheerful just like Tanjiro was for the others, she has developed a small crush for kanao and zenitsu but can't pick one. insole had became a hashira but only for awhile because of the dread of his friend, he stays hidden in a shack upon a mountain. kanao is more talkitve now because of the words Tanjiro has said to her but stays distant when upset or off, she used to have a crush on Tanjiro but started liking nezuko because of her cheerfulness.

do you think these four plus new characters can defeat the newly founded upper ranks and save there friend Tanjiro?