Carosen are everyone's best friends. They were made to be that way.
The kenaki realized, soon after the creation of the khibakrhi, that their children were useful, and gifted, and cunning, but not exactly approachable. The carosen were developed to fill in the gaps.
They don't judge people. They have no concept of privacy, or personal space, or secrets. Some would argue that they have no concept of self, but this is a misunderstanding. I posed this argument to a carosen, once, and she told me, "Of course we know who we are! Is there a better way to know who you are than to know who everyone else is, too?"
They love the kenaki as much as they love anyone else, especially since they're legally free, now. Most people can't stand to hurt them. This actually has more to do with their tenebre-bok servants than their cute-little-animal charm.
Tenebre-boks are their best friends. No carosen is without a tenebre-bok for very long. Other carosen make sure of this. Tenebre-boks are enormous, and carosen are often seen riding on their shoulders. They'll do anything a carosen asks them to do, because the kenaki made them to protect the innocent carosen.
Some carosen don't like that the tenebre-bok are instinctively bound to them, and are petitioning to have this removed. They insist that their friends would still like them, regardless, and are, generally, more passionate about this than they are to get their own instinct of loyalty to the khibakrhi removed. The latter isn't likely to happen. The kenaki made the carosen on commission, for the khibakrhi, and the khibakrhi are not swayed by big eyed rat creatures.
The story goes that when the khibakrhi commissioned the carosen, they tricked the kenaki, and only paid part of what had been asked. In retribution, the kenaki made the carosen lifespan short - only twenty years. The carosen shrug this off, and don't believe it. In truth, their short lifespans are more likely a result of their rodent blood.
The kenaki did push for their legal recognition, and even made the tenebre-bok for free. Kenaki cruelty is or lack thereof is hard to determine.
Carosen families are enormous. If something happens to a carosen's parents, someone else in the family readily takes the child in. Cousins, aunts, uncles, grandparents, friends, visitors and just about anyone else can and is accepted into a carosen's family. Carosen children are raised communally, in large households, and reach maturity quickly. At four, a carosen is mature enough to hold a job and wander around the city on his or her own. They usually get free train and taxi rides, because they just don't take up enough space to justify it.
Some are religious, and those who are tend to be fervently so. The kenaki and khibakrhi tend to say that there are no true gods, and that magic, gods and spirits included, is just the conscious manipulation of objective reality. The carosen take better to the idea that every race gets a god who created them, and even though the carosen were created by the kenaki, they get a god, too. Most favor Ginjan.
The Keahbehal branched off the Abioni Ginjan faith, and took on elements of just about every other religion it came into contact along the way. It emerged as the most accepting and inclusive religions entity in the city. Most carosen are members, even if they don't follow the dogma. Anyone else can join. They don't mind. Keahbehalites wear scarves and wide brimmed, black hats. For every year a devotee is a member of the church, they receive a bead to sew to their scarf. They hand scarves out liberally, and are known for their charity as far as warm coats and mittens go, as well.
They look like bipedal mice. Their muzzles are blunt, and their mouths are wide, like a pug dog's, but with less wrinkling. Their ears are huge, and need to be covered up outside, lest they get frostbite. Like the khibakrhi, they have two fingers and a thumb on their hands, and two toes with a smaller claw, on their feet. Their tails are long, but not especially dexterous. Their fur is short, and usually sandy brown. Male carosen have darker brown patches around their eyes, and a white stripe down their nose. Female carosen have white eye patches, and a brown stripe. Some carosen hide their faces behind hoods or masks, and paint spirals in their fur. These carosen, called Acaren, willingly give themselves up to the kenaki to learn about the fluidity of their forms. They say that they trust their creators implicitly.