User blog comment:B214/General Discussion/@comment-73.46.6.122-20161215211018/@comment-29963364-20161215221655

"Natural/Pure" Fallen Angels  (Angels becoming Fallen Angels)  are becoming more and more rare as time goes on. And Fallen Angel Hybrids (like Akeno) are starting to out-number Natural/Pure Fallen Angels, making Fallen Angels pretty much "extinct" (similar to how many Devil Clans are "extinct" despite still being active).