Of course i would not be suprised if some of dragon slayers commanders were actually black ring agents installed to give slayers a "push" in right direction, since
one of commanders of seekers was demon worshiper, so it's possible.
Maybe, but it would be harder since the ritual erases the former memory. However, it's more a kind of sect than a 'military order,' so I guess some of the first Dragon Slayers could have been Damian's agents.
