Kinda disappointing that a big shot in Japanese myth like Shuten got shafted in basically a single chapter. I fully expected him to interfere with the fight against Tai Sai, but I guess the author wanted to tie his end quickly and serve as progression on character and power to Face Peeler.
Speaking of the tunnel ghost, Face Peeler is now cemented as a completely unrepentant serial killing psychopath. It doesn't really matter at this point if he has some sob back story. An entity who relishes on the spectacle of final moments of life is something that should not be trusted at all.
Though funnily enough, he reminded me of Megamind.
Bleached Head: Oh you're a murderous evil spirit alright, just not an aesthetic one
Shuten Doji: Oh, yeah? Well, what's the difference?
Bleached Head: PRESENTATION!
It'd be hard to win against someone with foresight after all.
How complete is that foresight of his, that's the question. The previous chapters sort of showed that Yayoi's victory is not guaranteed, and all Seimei's help is just balancing the scales.
Perhaps this is also part of Seimei's plan. Since it looked like he sealed Shuten, maybe they can use him against Tai Sai?