I figuratively vomited in my mouth this chapter.

I don't see Esdese switching sides unless the prime minister decides to betray her. While her personal morals aren't as bad as the Wild Hunt, I recall an earlier chapter where she led a raid an attack on some village (possibly after attaining her Teigu?) and ordered her soldiers to rape the women and pillage the village. She doesn't care about what happens to people as long as her comrades are still alive and that she's allowed to keep on destroying everything.