The bond between Tanjiro and Nezuko has already been established a close. However, due to her being a demon and staying in the wood box she can be forgotten. Tanjiro manages to escape terrible damage from Rui’s thread, only getting a scarred on the face. Meanwhile, Inosuke is impressed with Giyu abilities. Giyu is annoyed by Inosuke and ties him up in a tree. Shinobu injects Zenitsu with an antidote, while other Demon Slayers arrives to free the others. Tanjiro is finally cornered by Rui’s web of threads, Nezuko jumps out of the box. She saves Tanjiro, but is severely wounded.
This event stuns Rui, who claims that he wants that kind of relationship. His pretend sister, becomes insecure. She asks “what about me,” he cuts her into pieces. She begs for a second chance, he tells her to kill the other Demon Slayers on the mountain. Rui tells Tanjiro that because he’s so moved by their bond, he will let Tanjiro live if he gives him Nezuko. Obviously, this isn’t going to work. Tanjiro refuses and tells Rui that he’ll kill him first. Rui finally reveals that he’s the member of the Twelve Moon. His eye says “lower five,” which is an odd way of to number between one and twelve. We still don’t know a lot about the Twelve Moon’s, but it seems that maybe the numbering isn’t quite straight forward. Regardless, he simply takes Nezuko. She slashes him with her claws.
None of this seems to bother Rui. He tethers Nezuko in his threads, cutting into her limbs as punishment. She falls to sleep in order to heal herself. Meanwhile, Tanjiro uses the Final Form of his Water Style. He’s able to cut the threads now and creates a water dragon. Realizing the threat that Tanjiro possess, Rui uses his Blood Art to strengthen his threads. We get a flashback of Tanjiro’s family, mainly his father. His father was frail and was able to dance to pray to the God of Fire. His father told him that he was able to dance because he was using “special breathing techniques.” Tanjiro transforms his water dragon into a fire one. He now able to cut the more enhanced threads.
Tanjiro moves closer to Rui, who finally moves into striking range. He accepts that he will likely die from their encounter. Nezuko is awakened by a vision of her mother asking her to save her brother. Nezuko uses her Blood Art: Blood Ignite, burning the blood on the threads. The fire travels along the threads, destroying the webs that Rui created. As Tanjiro says that “the bond between he and Nezuko can’t be severed,” his sword with Nezuko blood on it severs Rui’s head. My review won’t give this episode any justice. We’re talking about anime here. The animation and the music created a experience that gave me chills. To say I was hyped would be an understatement. If you can watch this episode, you won’t regret it.