Your tengen’s little demon sister, he’s the older demon brother, and your both upper moon 6 and you come across 4 demon slayers and 2 hashiras

Tengen: Well, well, well, what do we have here..?

the demon slayers are Tanjiro Kamado, Nezuko Kamado, Inosuke Hashibira, and Zenitsu Agatsuma. And the hashiras are Ume and Gyutaro