Technically nsfw concept drawings of Jozef Ethaniel, the man whos skin is of armor.
The armored man of the west, his skin is of stone after he was microdosed with vapor(magical energy) over a 5 year period slowly enlongating and having his skin peel off as patches of a crusted layer of calciulm sprout on it. Despite how his skin appears, its more akinned to incredibly hard and durable bone than actual rocks you'd find outside. Remenants of his original organic skin are seen on his openings with it peeling and appearing as if its dead, his muscles are exposed and seem tensed as if its either fighting the extreme weight of his skin or in severe pain from particles irritating it.
He used to be a loyal soldier of the Fentisk Empire, he even became a Lieutenant when he became proficent with his stone skin. He would became a severe opium addict while drinking loads of imported vodkas and "exotic alcholic beverages" to cope with the pain of his exposed joints. Eventually he would be loyal no more after he fought with the Slayer of the East, experiencing a severe brain injury in his fight with her. They say he became a monster due to the head injury as he would go awol and slaughter comrades and others no matter what side, but most say it was actually the experience of war. Stories will tell you he was a poor peasant who sided with Mikhail and his comrades but he was actually a poor merchant who tried to profit off of illegal acts of trade but failed all the while having no connection to his family or any close friends up until Mikhail.
He resented his merchant roots as they brough no rewards and he accepted the peasant story almost becoming delusioned into thinking that was in fact his actual story. His brain is said to be mush so while he still has the intelligence of a normal person, his actions and actual behavior are as unpredictable as the vapor that transformed him. Some say hes a false apostle, some say hes an angel that couldn't bloom, but all know he was a monster of the east.