I could only see this as a Princess offered in the name of peace. Like the princess of the former enemy nation married to the noble of the winner as a gesture of a good will (or a hostage)
I don't know how it will be played, but will see
Christina is good, without a doubt, but there is one more powerful girl, which to my disappointment ruined all light novel. The constant barking of this two just UNBEARABLE
Didn't Luxion sent this image to Livia and Ange saying Leon is creating? He's one hell of a petty familiar to act like this because of a mistreatment xDDD
The thing is, if one of SSS ranks want to retire, what can you do about it? Even as a government? This is literally Nuke with 2 legs and free will. If you just try to force him, he'll just leave to another country, there's also worldwide relationship, and other countries will make a comment on...