User blog comment:B214/Volume 17 spoilers./@comment-117.193.172.96-20140220172147/@comment-1359322-20140221002512

Actually in DxD Fafnir was never a dwarf, he is a real Dragon. As to what happened to Fafnir, revived by Norse Gods, i'm sure it's not Odin only but might have played a role. Made a contract with Azazel. I think this might have played a role too. >_> But probably out of shocked of the Oppai Dragon, having another Dragon being labelled with breasts and butts drove Fafnir crazy, and then Fafnir realized he likes panties and became the panties Dragon.