Are they dangerous? Why does the government feel the need to keep them hidden?
Oh, someone else interested? Good to know people don't think I'm crazy.
Now, answering the question... I would bet they are, but in a very subtle way. I just recently got introduced to the nation I work if, and got trusted to the documents about them as well. And, for what I could read in them, it's said that a nation exists since the creation of their countries. Or, at least, the feeling of belonging to them.
I'll pick an example for you: the American personification. I might presume, they exist since the declaration of independence, back in 1776? So, I bet they fought at least on the American Revolutionary War, perhaps the Civil War too... And even in both World Wars! And we know exactly what the USA has done during these periods, right? I wouldn't be really surprised if the personification is behind all that stuff.
So, if they're dangerous? I'm 90% sure of it. They might act friendly around you, but a good remind is that the most possible chance is that they are war criminals. They are the type of people — things? Idk what to call them — that will smile at you but then shove a gun at your face if you speak too much. I hope I don't have this "conversation" with my own nation...
Now, why the government wants to hide them? They never gave me many details. They only said they would pay me and guarantee I'll stay with my job if I keep their existence a secret. So, it means not even us who work to them can know what they hide. But I believe it's for the very own reason that they committed atrocities in the past. I can't see not even a single one of them not doing anything wrong. If not even humans that have a short life can remain pure, imagine these immortal beings that have lived through wars and violence of all types. If humans were to know we were existing with these... things, them it would mostly cause a great fuss, something not even the great powers would be able to control.
I particularly don't want to mess with any of these nations... After all, my life is way more "fragile' compared to theirs.
But I'll eventually have to. For the sake of knowing what the heck it's up with them.