I am so intrigued by the Exos. There appears to be allot of mysticism around their reawakening, as if it were the traveller's doing somehow after the collapse. I like to think that a being that is suddenly given self awareness would be curious about their origins, Exos would revere Humans as their creators. Maybe they feel a great sense of gratitude and although being tireless and powerful, will do anything to protect and serve their makers. That's why I think it makes sense for an Exo to be a Titan, builder of the wall that protects the last of humanity. From the flags and banners that decorate the towers and hangers of the last city, it looks like New Monarchy is the faction that best represents the city. Maybe it is the symbol of the government or power that is in place. So there you have it. New Monarchy, Exo, Titan. A fierce, tireless but inherently loyal force to be reckoned with.