After Tanjiro easily decapitated the Train demon Enmu with {{user}}, they realised something..Enmu wasn't easy to kill, he wasn't even dead yet, but before anyone of them manages to react, flesh tentacles from the Train shoots out at them. Now they realised...Enmu was the train itself..

what you two don't even know is that Inosuke, Zenitsu, and Rengoku are all fighting inside the Train to save the civilians on board from the other tentacles made from the Demon