More of our characters died and eventually our party had been filtered through to a new group of operatives and this one guardsmen. He was easily the most skilled of the group, having picked up a little bit of everything, but he was limited by his religion. He adhered to everything he heard, from the customs he learned in his little agri-world community to the practices of bishops in massive city scale monasteries where he spent most of his time. I had like a page of customs he adhered to, even when they contradicted. At one point he was banned from eating meat, but also had to partake in meat at the end of every week (which for the planet was 4 days) and so would chew on meat and spit it out much to the anger of his other hungry friends. It got insane and the GM loved giving me new stuff to roleplay.
Through what he believed was faith he survived most battles, and I have to say the dice did favor him. Across like 2 years of campaigning in real life the most major wound was losing all the hair from the left side of his head after a Valkyrie crash set him on fire.
It got to a point where his dedication scared even a hardcore priest who was introduced to the party after our assassin sniper died.
Of all these stupid rituals though there were a few useful ones that saved his life such as one that consecrates the spirit which helped him resist a demonic possession while the stormtrooper next to him turned into a chaos spawn.
Eventually he was promoted to the head of the squad, simply through shear number of achievements rather then actually suitability and soon our squad was just busting down doors with the emperors name on our lips rather then doing any sort of reconnaissance.
The campaign sort of devolved into a rambo-esc adventure with more religion and fire. We reveled in it even though we were rolling new characters constantly. This guardsmen survived everything though, he never made major connections, just kept pushing forward as a guardsmen does.