Dragon Faithful

Dragon Faithful (竜を祀る民) is the name for those who worship the Dragon Princess, Milim Nava.

Background
Strictly speaking, the members of the Dragon Faithful are not Milim's subordinates. They chose to worship and obey her command by their own will. Milim's domain, which didn't really have an official name, featured a population of under a hundred thousand, most of the people living off the land in harmony with nature.

The Dragon Faithful that resided in the City of the Forgotten Dragon, numbered less than a hundred thousand in total. They all worked together in their daily lives, there being no central government to speak of. As a result, none were particularly gifted in battle—they relied on Milim's protection to keep the peace.

That, at least, was how it appeared to outside observers, but this was only half right. In fact, all of them are Dragonewts who possess formidable combat ability.

Abilities
The Dragon Faithful, thanks to certain local conditions, all had very strong physical skills. In addition to their organizational acumen, each adult was strong enough to almost reach C-rank. Their pacifism didn't make it clear at first, but this was actually quite a formidable group of warriors.

The priests, in particular, were in a class of their own. There were only a hundred or so of these guys, handpicked from the best the region had to offer. Their daily "prayer sessions" to Milim (i.e. battle training) gave them superior combat skills, and once one got up to the level of Middray or Hermes, they were even strong enough to give Milim a decent challenge.

The priests are actually dragonewts that look like humans. The difference is that instead of evolving from lizardmen, they are the descendants of dragons that 'humanized' themselves and mated with the human race. But in essence, they are the same.

Almost none of them can bring themselves back to their original shape making someone like Stella a very rare one even among the priests. Many priests don't have any skills like Dragon Change or Dragon Body with hardly any difference between them and human beings, except their fundamentally stronger physique. They instead became a practitioner of Holy Magic and hand-to-hand Martial Arts using Battlewill and Drago Fist that created by Milim.

Trivia

 * The Dragon Faithful are shown to be farmers and are self sufficient enough to grow their own crops.
 * The Faithful in particular are known to make offerings to Milim in the form of their best harvested crops, with Milim being known to pass by and eat them.
 * However as observed by Hermes, due to the fact that they are raw vegetables, Milim is noted to be highly unhappy with the "offerings" and is known to make a deadpan and unsatisfied expression as she ate them.
 * There's even a cameo gag in Slime Diaries Episode 8, in which Milim's statue in City of the Forgotten Dragon broke when she was enjoying roasted sweet potatoes in Tempest. Hermes commented that it must be a divine punishment for serving her something she doesn't like.