@AnimuVsMango I think the idea is that the old ones themselves drive people insane so that they either welcome the end or feel like they have to worship them.
(Plus old H.P. was super racist, and didn't think much of non-white religions)
Damn, page 13 was intense!
That said, he had him by the face just afterward, why did he let him go? Same with when he was grappled, Rihito should be able to do a lot of damage once he gets his hands on any part of his opponent.
@Dudley two thoughts about why she can't speak:
1. Yes, she probably does still have vocal chords, but there's no guarantee that they're the same shape as either of her previous ones, so she may not have figured them out yet
2. And if they're shaped like the dragon's, there's no guarantee that...