It’s always best to know about an enemy before they do bad shit and get killed for it, so Demon Slayer’s penchant for having the lives of demons flash before their eyes as their heads turn to ash isn’t the best approach for engendering sympathy.
Don’t get me wrong, Rui’s origin story is a sad one, especially how he misunderstood his parents’ intentions and how Muzan manipulated him, and I like how Tanjirou doesn’t apologize for sympathizing with demons who feel guilt and regret in their final moments, which Rui clearly does.
It’s less a matter of the content of Rui’s backstory and more a matter of timing. Call it Mount Nagatumo fatigue, but when Giyuu hacked Rui’s head off, I was ready to move on to other things. The episode, however wasn’t, and quite a bit of melodrama ensues.
Once Rui is gone, it’s basically cleanup time on the mountain, which is where the Kakushi come in. The unsung heroes of the Demon Slayer Corps, they provide a support role, treating injured frontline slayers like Zenitsu and Inosuke (who may now be facing a crisis of confidence) as well as the near-victims of the demons.
No sooner does Rui burn away than Shinobu swoop in to kill the only other demon in play: Nezuko. Of course, she’s not aware that Nezuko is different, and has been conditioned not to harm humans. She’s simply following her edict to slay demons, and when Giyuu stops her, she sites both the rules and repeatedly tells Giyuu that no one likes him.
Tanjirou and Nezuko makes a run for it, but they’re soon caught by Shinobu’s sister, who was part of the Final Selection and sports a very sweet boot-and-cape ensemble. Nezuko is able to get away and shrink herself to make for a smaller target, while Giyuu catches Shinobu and the pair prepare to fight each other seriously.
Thankfully, Crows from HQ provide fresh orders: they are to take both Tanjirou and Nezuko into custody and deliver them to HQ. That means for the time being, Nezuko lives. When Tanjirou wakes up, he finds himself surrounded by the Hashira (i.e. elite slayers).
Looking at these guys I couldn’t help but think of Soul Society’s Gotei 13 from Bleach, whose captains were a similarly eclectic, eccentric bunch who heavily personalized their shinigami uniforms. I look forward to meeting these weirdos and learning more about the Corps, while sincerely hoping the higher-ups don’t push for Nezuko’s execution or separation from her brother…