Webtechnically with nakimes bda she could of just put all the demon slayers and upper moons and tanjiro's team (including kanoe and genya) in one room but there are two reasons. Webnakime (鳴 (なき) 女 (め) , nakime?) is a recurring character and a supporting antagonist in the infinity castle arc of demon slayer: She is a demon who owns. Webafter presumably giving nakime more of his blood, she gains a new, strong ability that allows her to create and detach eyeballs from her body. Webas time passes, and tanjiro rotates between the different hashira and their different training focuses, the squirmy eyeballs puppeted by nakime, the biwa playing. Webthe opening thread gives tanjiro a path to follow in order to slice through the neck of a demon. He visualizes the scent as a thread that is attached to a demon's neck at an. Webthe infinity castle becomes the battleground for the epic demon slayer finale as tanjiro, the hashira, and the demons face off in a challenging fight. Webthe former upper moon four, hantengu, met his demise in the swordsmith village arc, where he fought against tanjiro, nezuko, genya, and mitsuri kanroji. Webyes, your point is correct, the opening thread defines where is the best place to slash the sword that will behead them in a single swing. The opening thread scene.