I caught the second episode of the new season of Kimetsu no Yaiba last night and, as I suspected, it consisted, I think, entirely of footage from the movie. Having it juxtaposed with the animation in the first episode, though, reminded me of how the movie was criticised for looking no better than the television series. Now I can clearly see the direction is at least better in the film footage. There are more creative angles and there are fewer scenes of characters just standing there talking about what they're going to do.
The opening theme was new, though.
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The influence of Rengoku's popularity is obvious. Within the context of the overall story, there's no other reason he's more deserving of prominence in the opening than, say, that spider family from the middle of season one or the demon in the haunted house whose drums altered physics. But I do like Rengoku and his weird, constant, unblinking stare, an unrelenting beam of genki.
But my favourite characters are Nezuko and Inosuke. This first episode had one of my favourite moments from the movie--Inosuke riding a train for the first time is like an excited dog in a car. His exultant laughter as he presses his boar head to the window cracks me up.
I noticed he takes off the head in the opening. There's more and more merchandise showing him without it, too, which is disappointing. That boar's head is 60% of his appeal.