Caeli Kingdom's Prisoners damned for severe punishments including death. At times of war, to become a Bhopper, you had to be a rabbit with so much bad luck to be either kidnapped or arrested by the militars, forget your freedom and who you used to serve, because now you have to serve your superiors, literally everyone who isn't a thankless prisoner... And pray the goddess sisters to survive for your parole(good luck).

The Bhoppers were commonly used as mules, meatshields if they disobey or fail orders, scouting groups, mailmen, and sex slaves. They had no permission to wear metal-plated nor chainmailed armor, limiting them to wear their prisoner clothing, leather or fabric-padded armor to survive, a thing that is pretty good for them because they're the most lightweight and agile special force the Caeli Kingdom had in their units to fight the other factions and their special forces. Bhoppers rarely survived, but if they survive, they are rewarded with goods and the permission to be pardoned from crimes.Maybe...

This special force may be the weakest they fought in the War of Elements in appearance, but in battles, like a Caeli soldier, they were skillful with their aerokinetic skills and various weapons they had available.

After the War of Elements, the special force was already disbanded decades ago because the Caeli Kingdom suffered a coup, and the fate of the former remaining Bhoppers is unknown.

Ninjas were originally big groups of civilians who voluntarily joined to serve the Aqua Empire because they have a rivalry against the Earth Snakes because they can easily cure their muddy and slop venom with their water arts. And they're very skillful combatants.

Their authority level isn't the big deal, they originally were civilians in the Aqua Empire's eyes who cooperated to keep their lands safe and prosperous, but that annoyed the Aqua Emperor, thinking all they do is vigilantism and were a burden for their soldiers so he offered all of them to work for the Aqua Empire and all of the ninjas accepted.

They rarely move out of their comfort zones where is the areas they control, because they're expert defenders. However, the Ninjas prefer to carry lightweight equipment for their bodyguard missions.

When the War of Elemets ended, various Ninjas abandoned the Aqua Empire to return to their clans, others decided to stay with the empire and work in the shadows.

Rock Snakes were heartless and greedy assassins or mercenaries who somehow, got hired to serve Terra.

The majority of their members would enjoy to steal goods from the royals or were craving to stab their own customers from behind when they had the chance to do it, but being very well paid for sabotaging rival factions, mainly murder important persons from rival factions, was more profitable and funnier for them.

Their Authority level is based of their customer's job, but they never got hired to be a commanding job higher than a subliutenant or sergeant if their customer is a militar to prevent giving these merciless thiefs more power and liberty than a common soldier.

Their weaponry is full of poison, that's why they have that name as a "special force" and they rivalize with the Aqua Ninjas because their miraculous water arts were very useful to clear out their toxins from the victims they tried to murder.

When the War of Elements ended, this "special force", instead of be disbanded like the other three special forces, the Supreme Lord Terra took the chance of arrest and execute the majority of the snakes he was able to find before they were able to react quickly or betray the Terra Authorities. The fate of the remaining criminal guild's members remained unknown, but the Supreme Lord Terra won't hesitate in governing with a solid hand and punish everyone in the Terra Continent who dares to be a menace for his Empire or whoever dares to challenge his authority and power.

Ignis' Hellhounds were the opposite of those bunny weaklings, they preffered to burn things down than toying with piss like those masked weebs, and purer in heart and honour than these poisonous-toothed fools. The Hellhounds Squadron was created by and for the war, they were brave soldiers who didn't fear to charge against batallions of enemy soldiers beause their enemies were the ones scared of their existence.

The Hellhounds were very well sustained by the Ignis Emperors, had a better treatment than a general and they were able to do anything to serve their faction. Of course their authority level was above General, commonly mentioned as the "TRUE General Rank".

The rank application to become a Hellhound was a scary mistery for several Ignis militars, specially, for those who were interested to join to this legendary special force, it was known that only the current Hellhounds can choose by voting, their next new members if one or multiple of them were MIA(Missing In Action) or KIA(Killed in Action), and the potentially next Hellhound member had to be a canine and to be a godlike with the pyrokinesis.

When the War of Elements ended, the Hellhounds' remaining members needed to disband this hellish rank to cry for their fallen comrades and rest their war wounds and scars in deserved vacations or in a asylum like the rest of veterans suffering from PTSD until their lasts days.

Lux and Tenebris had no special force fighting for their respective factions/reign/empire. Instead, their own monarchs and citizens popcorned the war at the comfort of their own continents for almost two decades until simultaneously both Lux's and Tenebris' ordered their armies to without much efforth conquer SIRIDIA when their enemies were too weak to fight back. They stopped the four armies from killing themselves and damaging the megacontinent even more than it already has been left... Officially naming themselves the absolute rulers of SIRIDIA.