Koschey used several outfits, like:
1. Garadrian army KZ-2S light protective suit
Koschey was not Garadrian, so, technically, he had no right to serve in Garadrian army as a soldier. He was one of Chud volunteers who decided to help Garadr during Ephiric War, so he was attached to the 'Moon Gates' expeditionary force as a civilian specialist. And, to make everything even more complicated, he was given the position of a chaplain. It was a very unusual thing to do, because Chud and Garadrian churches had several major disagreements considering God and worship. Still, Garadr took any help it could get, so Koschey, being an official Chud priest, became a 'semi-official' Garadrian chaplain.
KZ-2S, as any other Garadrian tech used behind the Moon Gates, was simple and very sturdy. It consisted of a black, hermetically-sealed protective suit combined with bulletproof vest and additional armour elements. That uniform worked as a pressurised spacesuit, which protected its wearer from ephiric radiation and micro-particles of raw Ephirite. It also gave protection from poisonous gases, along with limited thermal and aggressive chemical compounds protection. The helm had a faceplate made of smart glass, which displayed tactical info and had other useful functions. Alas, due to null zones, smart glass had a chance to cease functioning in the middle of a firefight. The suit also had in-built temperature control module, a comm device and simple, yet functional med injection system.
Instead of a dark-grey camo used by the expeditionary force, Volkov's suit had black-and-white colour scheme. Most of it was black, with white Heavenly Sword painted on both shoulder pads and one smaller Sword painted on the left side of the chest plate. The helm also had a short white stripe painted on it.
Overall, it was a good, comfortable suit which gave its user a decent (for a civilian personnel) level of defence, not hindering his ability to move. It was light, sturdy and very reliable. Later, after returning to Garadr, Koschey tried to make the local Church allow him to keep the suit, but all attempts failed, and the suit was confiscated.
2. Refugee uniform, type 4
After returning to Garadr Volkov discovered that Chud, his homeland, officially declared that Global Military Council (World Government) was wrong, and that Whites (army of Ephirite creatures) were the victim of human aggression. This resulted in a huge scandal and total isolation of Chud from the side of other countries that survived E-War. So, instead of respected veteran, Koschey became one of those 'darned Chud arseholes'. He failed to prove his participation in Final Assault mission because of the half-legal nature of his employment. Garadrian officials decided to rid of unnecessary veterans to save funds, and many war heroes were turned into low-class citizens in a blink of an eye. No payment, no tax termination, no lowered rent rates - nothing. Initial riots were brutally 'pacified', and media played it as 'uncontrolled violence of mentally-unstable ex-soldiers'. Two days later Moon Gates exploded (there started the origin story of Eva Bär), cutting off the way home to thousands of soldiers who were left on the other side.
Koschey found himself in the middle of a hostile (in fact) Garadrian territory, where people hated him for being Chud and local government provided almost no support or protection. Instead of a grade-4 living quarters he had to receive as a veteran, Volkov was transferred to a refugee camp situated outside the guarded city perimeter. There his KZ-2S was confiscated and he received his 'type 4' refugee uniform. It was a suit made of cheap materials. It consisted of grey pants, army boots, shirt and one trench coat. Type 4 was considered a 'high-class set'. A 'normal' refugee usually got only pants and a shirt. Even boots were not included in a base set. Koschey managed to obtain the good stuff thanks to Varvara. Being Chud too, she asked her contacts to provide him with more decent clothing.
To be continued.