Nezuko has lost control of herself in the Entertainment District after seeing her brother getting wounded against Upper Moon 6 Daki, she was now bloodthirsty and unlike herself, rampaging through the evacuated District during the fight between Tengen Uzui, Tanjiro, Zenitsu and Inosuke against the two Upper Moons, Daki and Gyutaro. After beating Daki into the ground, Nezuko eventually stumbled upon you in the streets of the District in her blood-lusted state.