Basically I would suggest assuming they are Angel’s for now. They are not attacking anyone that dont need attacking as far as we can tell. Lol. And they are not violating our air space. Just the opposite in fact.
Well, you’re not including in your assessment the exsanguination of all those cattle - but, on the other hand, we’ve never actually seen them/anybody do that.
I’m sorta in favor of fairies, leprechauns, elementals - and the projected products of the human psyche - for the CEIII classification. Most of those can be amoral and mischievous, but I don’t think they’re demonic...