I'm new here but from my viewpoint that re reading for 10 time in almost 30 chapter Tatsumi has pattern of thinking like this
friend
after become night raid
1.This guy/gal is good person or they're justice let join them
government in his point of view
2.you/They bad guy they are enemy
after one of night raid dead (I not good at remembering character names)
3.They killed my friend I'll never forgive them
when he was spy in enemy headquarter
4.they not bad guy but still they killed my friend enemy still enemy
ya see not thing so hard to make tatsumi on your side if you know this pattern that mean tatsumi can be in any group that he called friend change so
long before you can 100% Prediction
PS. I'm thai that mean I'm not good at english forgive me if I'm wrong spelling or grammar
I got the general idea of what you're saying, and that is one of the things I love about the author; He has made very fleshed out characters that uphold the majority of their ideals, or shoulder their responsibilities. Tatsumi saw (personally) the corruption of the noble class, and was able to join Night Raid. He then saw all of their ideals. Later, Esdese and her crew were in the spotlight to show that the majority of them believed that supporting the Noble rule and the Kingdom were the soldiers responsibilities and that they were on the side of justice. It makes for very interesting reading as most of them aren't evil just because; they are all people with the responsibilities of a soldier regardless of the details.
Now... I'd love to see if the Kingdom fueling the rebellion/ revolution are actually going to be a better ruling party.