I was just too lazy to draw shadows so sorry for taking so long to post this

So yeah... we all know it is deadly, it comes from the Bliss barrels up the reservoir dam, sure!

But... it must have some connection to the FC5 game! So I have a headcanon about the siblings!

The screen of Bliss/fog? It has a connection to Faith, the siren. Remember that we always have seen the path to the Eden, when the deputy got all high on Bliss? There always was this giant tree you could see in the background, which had walls of fog/Bliss all around it. There also were the Gates to Eden when you had to stop Sheriff Whitehorse stepping through it.

The screen of Bliss is the guardian for the 'real eden', the real path and it's gates, to the apple tree and Joseph.

As Faith was the guardian for the path to Eden, it's gates, the giant tree and Joseph.

The 'apple tree of judgement' (yes, that is how I call it)? This is about John, the inquisitor. What did he do? He was the 'Judge' of the sinners, decided when they were free of sin, when their soul was all cleansed and ready to go. Side note: Holland Valley acted as a big farm from where Eden's Gate would get all their supplies and provisions before, during and after the collaps.

The apple tree and it's fruits? It judges your soul if it is clean. Only pure spuls can eat it and if you are not pure... you will endure pain and in the end death. Side note: Joseph gave Carmina an apple when they all had a rough time finding eatable food

John judged you, if you weren't free of sin you would be tortured and could even die.

The Captain's demon, the fight with it? Well some of you might have realized that it all happens in front of Jacob's bunker, the soldier. What did Jacob do? He fought! All his live he fought for his brothers, against them, for his country and in the end for Eden's Gate. But now it get's interesting there! In Far Cry 5, Joseph Eulogy about Jacob, remember it? When he talked about Jacob he said:

My brother Jacob was a fighter. He fought our parents, he fought the government... he fought me. But, mostly, he fought himself. The demons that he brought home from the war consumed him. 

Jacob fought against his demons, against himself. So the fight against the bear/demon? Cap's fight against themselve, against their demon. When they lose... they get consumed by them (look at Ethan). If they win, they grew stronger... just as Jacob made the Deputy stronger.