User blog comment:B214/Volume 17 spoilers./@comment-24421137-20140221065803/@comment-117.193.177.20-20140221124909

Even devils have multiple wings. Like in Vali's case. But why is Rias having a single pair of them? They never showed Sarzechs wings, but i guess there would be multiple pairs of wing. And if its about Rank then even Ise should have 4 wings being a middle class devil.