Obanai at the Hashira meeting.
Obanai cringing because of Mitsuri.
Obanai preparing to train the swordsmen.
Obanai waiting for Tanjiro.
Tanjiro training with Obanai.
Obanai threatening Tanjiro.
Tanjiro and the Hashira fall into the Infinity Castle.
Obanai fighting the Infinity Castle' Demon inhabitants.
Mitsuri and Obanai finds Nakime.
Obanai catches Mitsuri and bring her to safety.
Mitsuri and Obanai nearly falls into the floor opened by Nakime.
Mitsuri evades Nakime's attack as a platform moves toward Obanai's direction.
Mitsuri and Obanai "die" at the hands of Nakime.
Muzan wonders how Obanai and Mitsuri could still be alive.
Obanai jumping in to pushes Mitsuri out of the way of Muzan's attack.
Tanjiro is relieved to see that the Hashira are all safe.
Demon Slayer Corps shielding the Hashira.
The Hashira engage Muzan in battle as Tanjiro laying unconscious.
The Hashira are all injured by Muzan's attacks.
Obanai worriedly calls Mitsuri's name as she is immediately affected by Muzan's attack and falls over.
Obanai's relatives obsessing over him.
Obanai coming face-to-face with the Serpent Demon.
The Flame Hashira saving Obanai from the Serpent Demon.
Obanai hoping he'll meet Mitsuri in another life.
Obanai awakening his Demon Slayer Mark.
Obanai slicing Muzan's tentacles off with his red blade.
Obanai, Zenitsu and Inosuke wounded from Muzan's attack.
Obanai blinded by Muzan's attack.
Obanai uses Serpent Breathing Fourth Form: Twin-Headed Reptile.
Obanai recalling how he and Mitsuri first met.
Mitsuri requesting to become Obanai's bride if they're reborn.