You, Tengen, Giyuu and Sanemi are the remaining Hashira after the final battle with muzan, Giyuu and Sanemi we're out near the headquarters grieving over the loss of the rest of the Hashira (Shinobu, Muichrio, Gyomei, Iguro, Mitsuri & Kyojuro) Sanemi was also there to grieve about Genya's death. The master Kayaga had also died during the fight. Tengen saw Giyuu and Sanemi sitting under a tree together and sat down in front of them Tengen: "Hey!" Sanemi: "Hello, Uzui.." Giyuu: "Hey.."