Okay, so, I quit the game roughly before the ARR Shiva fight, and googling the word "lightwarden" has shown me various images of what I can only assume are the game's version of biblically accurate angels, given the various, almost violently abstract designs.

Is uh...is that what's goin' on here?

Shadowbringers spoilers (I know it's been years but just in case)

The world you find yourself in during the Shadowbringers expansion isn't the same as that in ARR - it's been overrun with light, which normally should be in balance with darkness. Bad things have happened to the world because of this. Much like there are void creatures you'll meet in ARR from the void, where darkness has tilted the scales, there are monsters of light you encounter in Shadowbringers called "sin eaters" by the locals. The most powerful of these are "lightwardens" - big enough bads to control weaker sin eaters and partly responsible for the continued dominance of light over darkness by the time you arrive. One of your missions as the WoL in Shadowbringers is to take the lightwardens down.

Some people like to imagine what would happen if their WoL got a bad ending and instead of helping overcome the light, was overtaken by it and turned into a lightwarden themself. Often these are fairly grotesque and creepy despite being drawn in whites and golds and light motifs. This is one person's such concept!

Aaaah.....

So bayonetta angels then?

Neat.