Eva's Knight Lionel Hunter:
You're right. They are completely different from ordinary Krofin claws.
They look more like those of the Dragon Tribe. If we figure out what caused such a change, we can also know how Fafurion bestowed the ability to appease himself upon the priestess's kin.
I think it might be the way an outsider can succeed the priestess. To learn more about it, there is something you should get from the Fafurion Temple.