Koyomi takes Shinobu to Mister Donut, where they bump into Kaiki he learns that Yozuru and Yosugi are a onmyouji/shikigami pair specializing in immortal creatures. Initially he suspects they’re after them, but when he arrives at his house, Yozuru and Yosugi are ringing the doorbell. When Tsukihi answers the door, Yosugi slices the top half of her off, killing her instantly. Koyomi lashes out in rage, but when Yozuru tells him to look at Tsukihi again, her body has completely regenerated. Yozuru tells him she’s not his real sister, she’s an evil phoenix taking human form. Shinobu convinces them to leave, but they’ll be back tomorrow to finish the job, and they’ll eliminate anyone who gets in their way.
This arc is called “Tsukihi Phoenix.” A pair of eccentric ladies were looking for Oshino’s lair. This week Tsukihi tells Koyomi her justice is “fake.” When a Koyomi strips her down, he notices no scars (that last bit in the now requisite Sister-Grope-of-the-Week). Our mamas ain’t raised no fools. Tsukihi has an oddity; it’s an immortal phoenix, and the lady pair is here to deal with her. In fact, Yozuru seems amused that Koyomi would think they’re after either him or Shinobu; he’s only part-vampire, and Shinobu has lost most of her powers (though we like how they temporarily withdrew out of respect for her fame, or infamy as it were.)
Karen is AWOL this week; potentially having horrible things done to her by Kanbaru. But Karen was apparently victim to hypnosis administered by a con man that made her believe she was possessed by a bee. Tsukihi’s situation seems different, in that this is a real oddity being hunted by real ghostbusters. Running won’t work, as they’re pros and no one to be trifled with – Yotsugi’s vicious halving assault on Tsukihi is proof of that. Will Koyomi be able to talk them out of killing his sister? Can’t they just bring the real Tsukihi back…if she ever existed??
Car Cameo: A motorcade of white 1960s-era Nissan Fairlady roadsters (we’re guessing ’63 1500s) – ubiquitous in Bakemonogatari – drive by while Koyomi bikes home with Shinobu