"Some people might say that it's a little more angelic, but I would be happy if you could take your time to try it out for yourself."
What is there to try out? There is media tour footage of the whole thing now, saw a Hrothgar with Seraphism active showing the whole thing in detail. It's not "a little more angelic", the design is an angel. It's not much different than a random angel glam, just that an angel glam doesn't cut off racial traits like tails. You can call it different and pretend it's totally a fairy and super in lore somehow with some gymnastics, like some people in the threads about Seraphism, but it doesn't change how the design is by all accounts of what we have seen from angels and fairies in this game, including a grown scholar fairy in a Variant Dungeon, a generic christian angel.
I don't know, maybe it's less obvious to a person who didn't grow up surrounded by christian iconography at every corner like I did in Germany, where we had 10 churches in my small home town alone. No clue. But even if you go by stuff you see in the game only, it takes a lot to deny this costume doesn't fall into the same category as scholar fairies Lily and Statice nor Feo Ul or any other fairy in the First.