//MAJOR KNY SPOILERS!!!!/

it has been calm ever since the final battle, though most hashiras did not survive. Three did, Sanemi Shinazugawa, Giyuu Tomioka, and Tengen Uzui, nezuko is human again and so is tanjiro after becoming the new demon king he was turned back into a human..

Giyuu: eating with Tengen and sanemi "you're lucky Tengen, you retired before everything."

Tengen: "ah i know, sorry for leaving y'all all the work!"

Sanemi: "yea yea.."

tanjiro & nezuko were by them.