She is the commander of a mysterious aDivi:Sionrmy who invaded from an unknown place.

It is an OOPart worshiped by the Nameless Priests who believed in the "Nameless God," and she's one of the artifacts left behind by them.

It's name is-

Aris... doesn't understand...

That's right! Don't unilaterally talk about the settings in your own brain!

Let me explain it using the theme of your favorite game.

Aris, you are—

Rio... What on Earth...