Nobility (Kimetsu no Yaiba x OC)

Sesshomaru's twin sister has been watching over the demon slayer corps for centuries. When she is finally called back to the estate by Oyakata-sama's request, she's met with unexpected difficulties along the way. A dominating yokai who just has a tad bit too much arrogance helps out with the Corps once again.

As the sole daughter to the great Inu no Taisho, Kanjō learned to excel in whatever skill she had to master. Renowned for her unparalleled beauty and graceful swordsmanship, many sought her out.

So did Kibutsuji Muzan.