I mean she’s gone through a lot this book. Can’t be in a good place. Probably a bit PTSD and that over effusive smile is either put on or out of control

Other people more familiar with anime/manga have suggested it’s an homage to some manga art. I don’t recall the exact source, that’s not my area of interest.

That said, we haven’t entirely seen the showdown with Gog yet, so perhaps there’s some connection to that.

Personally, I’ve been thinking on how the White Chain/Allison/Cio fusion was named Aspected Chaos.

It’s worth keeping in mind that Allison is an agent of chaos, like Aesma. (And as someone else elsewhere pointed out to me, she’s also following Prim, as in the journey not the destination is the point.)