Below isn't really related to AV, but the jailers in general.
Also worth mentioning is the virtues and sins. I made a nice little list.
lust < Sensibility > Prudence (chastity)
gluttony < Moderation > Temperance
Greed <> Love (charity)
Sloth <> Faith (diligence)
Wrath <> Temperance (forgiveness)
Envy < Placidity > Hope (kindness)
Pride <> Justice (humbleness)
Vices are basically a corrupt form of a virtue, or an "in-between" two extremes. Each of the Ix'Aerns drops a Vice and a Deed, and the Vice can be turned in for its opposite, as shown below. Placidity, Moderation and Sensibility can be considered the mean between two extremes
Antipathy < Placidity > Mercy
Aspersion < Sensibility > Astute
Avarice < Moderation > Altruistic
Edit: well, I do believe the above part might be wrong, as I'm honestly not 100% sure what some of those words mean. It does hold true for Avarice < Moderation > Altruistic, though, which were the first ones I checked, but it might be a similar pattern to the others if they don't follow the same extreme < in-between > extreme pattern.
Additionally, all of the Jailers are based on the four Cardinal Virtues together with the three Theological virtues. Justice, Fortitude, Prudence, and Temperance are the four Cardinal Virtues. In old paintings, Justice is often painted wielding a sword.
Fortitude is often seen together with a lion, and is often seen wearing a mace or hammer, and wearing heavy armour.
Prudence can be seen together with some kind of serpent and wearing a mirror.She have also been portrayed as having two faces, and the mirror can often look similar to that of a rod.
Temperance can be seen pouring some kind of liquid in to vases, or holding 2 vases
As you can see, Square took the mobs etc. direvtly from the virtues. Temperance can be seen pouring things in to vases. Temperance is also a Zdei (Vase-looking mob). Prudence can be portrayed as having two faces and being together with serpants. Prudence is a Hpemde, and looks kind of similar to that of a serpent, and they're also two. Justice is a Xzomit, and can be seen as a blunt weapon piercing its target. Additionally, he drops a sword, which is what Justice is often seen wielding.