User blog comment:B214/Question and Answers 6/@comment-9595671-20160714212150/@comment-9595671-20160715015546

So he could only really make that work for Ophis then as she's the only god not directly related to any religions, unless of course her being born from the Dimension Gap which defies logic counters that.

I think it's probably that reason why Grim Reapers and Valkyries can be despite being part god. Because they're not fully gods or they aren't important parts of a religion's fold since there's multiples of them.