It looks like Kagetane has joined as an ally after all. I assume this is the gateway towards either his constant assistance from the shadows or his death. Either way, it looks like he’ll be helping Rentarou out with his suicide mission…I figured something like this would happen. The only question that remains is whether he will survive this time…my guess is that he will, but who knows? Maybe he’ll turn to Rentarou’s side and trigger his own death flag.
I’m really shocked that Kisara allowed Rentarou to go off by himself despite seeing him leave the way he did. She should have suspected he’s was heading off to die. It looks like the other characters will show up next week, though, so maybe she just gave him a head start and everyone else will be joining up next week.