User blog comment:B214/Question and Answers 2/@comment-24098614-20140425235909/@comment-1359322-20140426002531

It's not just Devils, Sacred Gears don't go to any Supernatural species, it doesn't go to Angels, Fallen Angels, Valkyrie, Youkai, Gods, Goddess, Vampires etc.

As to why Devils want Sacred Gears, Devils don't want Sacred Gears especially those Pure-blooded ones, they are prideful in their Demonic Powers after all. They usually target humans with Sacred Gears as their servants for their usefulness. Reincarnating a Sacred Gear possessor is always better than reincarnating a normal human with no special skill or ability after all.