Warning: Spoilers ahead.
But Inosuke has finally awoken from his dream thanks to Nezuko’s help. And he starts slicing and dicing with his Beast Breathing techniques immediately. Well, right after Tanjiro briefly explains the situation to him, while they both stand on the roof of the train.
Both Tanjiro and Inosuke do a good job cutting off tentacles before they get the passengers. But Enmu keeps regenerating pretty quickly. His plan is for Tanjiro and Inosuke eventually to run out of strength to fight back. Then he’ll kill the passengers right in front of them! What a bastard.
But help is on the way. Nezuko starts cutting down tentacles with her demon abilities. Eventually, the tentacles seem to restrain her, but that’s Zenitsu’s time to shine! In his unconscious state he wipes out tentacles throughout the train in a flash, using his Thunder Breathing Technique.
Next up to show his amazing abilities is Hashira Rengoku, who has also woken up! His flame attack spreads through the train. It’s strong enough that Enmu feels it!
Now that the Demon Slayers have a break from tentacles, Rengoku directs Tanjiro and the others. Tanjiro is impressed that Rengoku doesn’t even need to be briefed on the situation - he assessed it and knew what to do immediately.
While Nezuko, Zenitsu and Rengoku protect the passengers, Inosuke and Tanjiro have to hunt down the head and neck of Enmu. Even as a train form, Enmu still has these. They need to be destroyed.
With their super senses, Inosuke and Tanjiro track the smell of the head at the engine of the train.
The neck is under the floor of the engine. Inosuke and Tanjiro try to get to it, but Enmu’s tentacle defenses are at their highest here. Inosuke exposes the neck only for the gross goo to cover it up again.
It will take both Tanjiro and Inosuke striking one right after the other to destroy the neck. But Enmu also uses his gross eyeballs to constantly make Tanjiro go to sleep. Tanjiro keeps killing himself in his dreams to wake up. It gets so confusing, he almost cuts his head off in reality! Insouke stops him in time.
Even the dumbass conductor gets in the way at one moment, stabbing Tanjiro. Tanjiro knocks him out but still tends to the dummy.
Finally, they’re able to strike the neck. Tanjiro unleashes Hinokami Kagura! The train derails from the blow, Enmu’s head is cut off spiritually, and purple blobs fly everywhere!