People are saying "why didn't Arashiyama throw him outside of the ring" seems to have forgotten that Arashiyama main motives is not to win for Purgatory, it is to win against Meguro Masaki in judo and possibly in a death match style.
A little subtle detail by the author to point out that on Nishi is always the more prudent Chihatan. It might be hard to see but the girl with the helmet on Chihatan is actually Nishi, noticed how we can only see part of the bang.
I agree with leaving it vacant is not a terrible decision for now. I mean imagine if someone of lower prowess joining and the dude died because he isn't as good as the rest, then it will be a blow to morale and 6 generals reputation.
@IRIGAMAGORI
Judging from how she react on previous chapters regarding the conversation about Life Booster then I guess she doesn't really know the value of life booster.
@REDRED
Remember when those boys are still babies Noh once complained that he only need daughter and not sons then the next panel shows the twin babies leaving from the sight. So yea I think that is really likely.
I have never been a devoted Muslim in my life but reading this manga makes me long for God's guidance, love and infinite wisdom to save me from this evil.