Well practically Chyos is telling us that we will be baron of the town, and the queen is our lover if one of the brothers wins the war the queen will still be a tool too one of them so why not making us king to keep the queen and the princess to ourselves after all a source from her said that the reason Mc was taken away from the Capital is that he has Royal blood, maybe Lyvia can be the commander of the army if you don't trust men for the Post. Just saying that in My opinion not speaking for everyone that it would be cool to command armies and have battles the more content for the game the better. Like you said we already have a militia and a tribe why not going for the bigger prize the (crown) and maybe the emperor.
...I think you are referring to a very old argumentation that MC must be noble or a royal bastard since his mother was assasinated... something that's not done to commoners.
But that was a wild speculation back than and still is.
MC could declare the region of Arenfield independent and shelter the former queen as in her staying in excile in Arenfield.
Sure the old discussion should still hold some value, but with everything going on I can't imagine such a development right now.
This would likely require the development of Parakes (Capitol) and maybe dealing with "the other" King aswell, since it's unlikely he'll stand by while MC takes the crown in a revolution.
Personally I think that far exceeds the capacity of the game... maybe something for a Part 2.