SJWs are really aiming hard at Atlus for quite a while, and it won't be surprising they'll try to tackle on Vanillaware's new game that's possibly coming out next year.
I'm leaning more that Rin is just an angel which explains why Vincent freaked out, and it could be a callback to SMT with the whole angels and demons thing. Or Rin could be an horrifying abomination angel that you see in monster girl quest.