Looks like Yahaba is toast, but before he’s destroyed he makes life particularly difficult for Tanjirou, shooting all his arrows at him one after the other and forcing the Demon Slayer to pull off a long chain of moves. By the time Yahaba is gone for good, Tanjirou can neither stand nor hold a sword. And because there’s still one enemy demon still very much standing.
Fortunately for Tanjirou, Nezuko’s leg heals and she re-enters the fray. For a couple of minutes that fray turns into a soccer match, with Nezzy and Susa kicking the ball to each other with increasing ferocity. When Yushirou looks at Tamayo, she insists this is Nezuko’s own strength.
Even so, Tamayo believes Susamaru is still only toying with Nezuko, and it’s only a matter of time before she becomes impatient and goes all-out. In order to preempt that eventuality, Tamayo uses her Blood Demon Art to deaden Susamaru’s senses, then provokes her by calling Kibutsuji Muzan nothing but a petty coward.
While essentially under Tamayo’s spell, Susamaru says her master’s name while defending him, which causes Kibutsuji’s cells within her to tear her apart from the inside out. When there’s nothing left of her but an arm and an eyeball, Tamayo notes that she and her companion weren’t Twelve Kizuki after all, as the real ones have their number emblazoned on their eyes. She also collects some of her blood in hope it will help with her research.
Tanjirou, ever the empathetic lad, comes to Susamaru when he hears her death throes, and makes sure she has her beloved temari ball when the sun comes up, and with it her time. Like him I couldn’t help but feel bad for her, as she was merely a naive child used as a tool for the monstrous Kibutsuji’s whims.
Tanjirou is again reunited with Nezuko, who is once again healed up from Tamayo. While Urokodaki’s hypnosis makes her see all humans as family, Tanjirou is heartened to see she still has a measure of free will, because she’s chosen to see both Tamayo and Yushirou as humans and thus family as well. Tamayo tears up as Nezuko hugs her, and even Yushirou can’t help but blush when she pats his head. Who can blame them? Nezuko is a nigh-unbeatable combo of adorable, caring, and absolutely badass—all without uttering a word.
Tamayo offers to let Tanjirou leave Nezuko with her, as she’ll likely be safer than if she stays with her Demon Slayer brother. Before Tanjirou can respectfully decline, Nezuko does it for him, again making her own choice and taking his hand as a sign she wants them to stick together. They continue on to their next assignment, running into the blond kid from the Final Selection on the way. I see a team-up in the offing…