If you like you can look at the (sketchy, incomplete) GM notes as well.

The Soldier

The Soldier is the patron and the protector of every poor soul who finds himself alienated on a battlefield, with vicious enemies on one side and commands that appear to originate from madmen on the other. The Soldier is the god of stoicism, of duty, of determination even as the world around you seems to be falling apart. On another level, the Soldier is all about fidelity to oneself: sticking true to one's principles right to the bitter and bloody end.

What the Soldier isn't about is being rewarded in any way for this. The Soldier is not known to grant his worshippers exciting and useful powers to help them survive. After all, receiving aid from a higher power is complete anathema to the idea of being alone and helpless on a battlefield. His gifts may give protection, but only after great misery. They may give power, but only the power to throw yourself on a spear in order to save another man. Worshippers of the Soldier suffer. They suffer in order to receive gifts, and as a result of the gifts they suffer more. And they cannot turn to their god for solace and comfort, because their god, like them, is trapped and helpless, alone on a battlefield.

Rumours about the Soldier:

There used to be a secret cult within the Imperial Legions worshipping the Soldier, but they all bailed when the Legions fell apart.

When peace was established and the Emperor overthrown, the lack of war forced the Soldier to change form or die. He chose to die.

The Soldier has always wanted peace above all else, and he was the one who forced the Intercessor to save mankind.

Now that there's no widespread war, the Soldier is instead focusing on those who toil thanklessly in more mundane matters, like the silent sufferers of bullying in the workplace.

There's a war between the Gods coming. It would have come much earlier but the Soldier is too scared to fight.

Not one Soldier-worshipper ever dies a natural death. When they finally see the world through the Soldier's eyes, they all end up killing themselves.

To strengthen their master, the worshippers of the Soldier are trying to manufacture a war. Without conflict and battle, he is as good as dead.

One of the Ghouls in the Treacherous Lands is an avatar of the Soldier. She is trying to sneak into Horizon and fight on the side of the Ghouls here. Don't approach her, whatever you do, she's very dangerous.