The jailor system is somewhat recent (in hell-time, still a long time back in actual-world time), before that, Hell Beings were the wardens and torturers.
Hell beings range in size from the smallest, who are only the size of 1 human finger, to the largest, who are over 60,000 stories tall. Every part of their bodies is riddled with vile deformities, every part of their bodies sweats green bile, black puss, and tears, their flesh is harder than the center of a planet, they usually have claws fangs tails and horns, and spend all of their time screaming in rage and grief and murdering/torturing anyone near them, psychotic raving mad beasts who seldom have time to think thoughts or feel feelings. Their torture weapons are scalding hot, covered in razor edges, spikes, square edges, studs, bristles, points, weep poison continuously, weep fluid corpses continuously, burst into flames very suddenly randomly, magically return to their hands (or limbs) any time they are thrown dropped or destroyed, and usually are one of the following weapons; amputation saw, sword, curved sword, battle axe, spear, mace, cudgel, sai, dagger, polearm, knuckle-duster, chain noose, bo staff, man-catcher, javelin, short sword, short spear, 1 sided axe, 2 sided axe, ball and chain, whip, scourge, or bow and arrow. They also may have 1 of seven vile vases, which are filled with the following infinite fluids; fluid corpses, vinegar, acid, salt water, boiling blood, pain (as a substance) and evil (as a substance). These are 'infinite' in the sense that a hell being can simply pour it on you forever and never run out of it, not in the sense that they overflow continuously. Usually hell beings also shoot blizzards, lightning, hurricane wind, hail/sleet in a roughly even mix, or, lava, magma, or fire out of their mouths and butts any time they are in a crowd of inmates, firing this off endlessly and instinctually, the releasing going for as long as necessary and starting instantly.