User blog comment:B214/Question and Answers 4/@comment-24331706-20150319150433/@comment-25032153-20150320170452

yes that is what i was saying though they kind of mention that for all supernatural being not just devils as they said that halfs of supernaturals also slowed aging after coming of age. Azazel also mention that the halfs that make up the fallen angels number were also immortal even the human ones though they were kind of said that they were semi-immortal until they were fully turn to a fallen angel that was how they keeped their numbers as they view halfs and 1/4s as full fallen compared to devils (pure blood) also the vampire.