I'm not sure about that last part but yeah, I'm guessing she's creating the monsters. It would certainly explain in part at least why one of the control AI sticks to her like he does.
I mean it is a guess but the fact that she is implied to be "Last Boss" by and the name The Evil certainly sounds like some kind of Job, and it apparently took on the first Sacred King which, and supposedly from the story in Volume 8? Either nearly killed him or did kill him and he got revived, would make it very powerful which kind of fits with the whole Last Boss vibe.
Chapter 2 page 23, 4th narration bubble: "Entering it with a large group of soldiers could been seen as an act of war.
Chapter 3 page 25: Having "Oh right" starting the sentence for two bubbles in a row is a bit awkward.
Something from the volume 2 epub that I wanted to check:
"The countries close to Gideon are Caldina and Legendaria. The latter signed a treaty of commerce with Altar, while the former is a full ally
For some reason, I had the impression that Legendaria was Altar's ally; and Caldina having a treaty of commerce seems more like a match. Is my impression wrong, or did that get mistakenly flipped in the text?
Also, more generally, I remember Steiner commenting that Gardranda's title was being changed from "Demon" to "Hobgoblin." It was Demon in the (recently downloaded) volume 1 premium epub, but is that just a matter of the epubs not being updated, or did it switch back to Demon?