Mitsuri Kanroji and Obanai Iguro vs. Nakime pits the Hashira of Love Mitsuri Kanroji and the Serpent Hashira Obanai Iguro against the Rank Four Superiors Nakime in the Infinity Castle. Yushiro joins the fight near the end to assist the two Hashiras.
Prologue
Mitsuri Kanroji and Obanai Iguro are wandering inside the Infinity Castle when they stumble upon a female demon slayer with a huge bachi spiked biwa. They are both amazed that Muzan has already replaced the post of higher rank 4 Hantengu so quickly after seeing the character “Four” on his singular iris. Shinobu sacrificed her own life to help Kanao and Inosuke fight the High Rank 2 Doma when she was younger, Mitsuri thinks. This enhances her confidence and determination to defeat any monster, no matter how powerful.
Battle
Mitsuri attacks the Top Rank right away, attempting to decapitate her with a Love Breathing technique, but Nakime counters with her Blood Demon Art: Castle Manipulation, warping a wooden door between them. When Mitsuri’s blade collides with the wooden door, Nakime manipulates the door, pushing Mitsuri over the edge and killing her. Mitsuri’s nose bleeds from embarrassment and the backlash of her hubris as she collapses. Obanai grabs Mitsuri and pulls her to safety on a nearby wooden column. Obanai advises Mitsuri that since they have no idea how the High Rank Blood Demon art works or if she has any other abilities, they should analyze her abilities and proceed calmly, which she agrees with. totally. As they counsel each other, the “floor” they were standing on opens up to separate the two Hashiras. They both cling to the door frame and jump as more doors open to separate them again. The adjacent columns now move in order to smash them both, while Obanai dodges the columns Mitsuri has distracted for his safety and gets caught by one of them rapidly climbing towards a ceiling.
Fortunately, Mitsuri was able to avoid the crush by opening the column. Mitsuri leaps from the column and warns Nakime that she will be unable to hit her with the same attack again. Mitsuri leaps over the wooden door that had previously pushed her and sees an opportunity to kill the Top Rank by using a different form of Love Breathing. Nakime, on the other hand, teleports an open door for Mitsuri to fall through, causing her to deflect off the column and plummet to a dangerous depth. Mitsuri sighs, a victim of a similar attack. Obanai uses his serpent’s breath, second form: Venom Fangs of the Narrow Head, to try to decapitate Nakime, but the massive wooden column it was united with rises rapidly and knocks Obanai out. He notes that Nakime’s Blood Demon Art isn’t quite as lethal as his higher-ranking companions’, but it is far more frustrating to combat, making him think that their battle would be long and tedious.
The aftermath of the fight
Yushiro takes control of Nakime’s vision to move the Infinity Castle pieces outside so that Muzan will soon be exposed to sunlight, by covering Nakime’s eye with a paper talisman and piercing his fingers in Nakime’s skull. Yushiro manages to get the other Demon Slayers and Muzan out of the castle.