It's hard to say exactly what they are, with the height of a Kod-mezu, the skin tone of an Ehrui, but the most yellow eyes one will ever see. They are a beautiful people, to say the least.
Calling the Kul'din a pleasant bunch would be an understatement. They're a race of hard workers, and they never get mad.
Never.
The Kul'din don't own weapons. Not for fighting, not for hunting. They live a very vegan lifestyle, but are able to stay just as healthy as everyone else. The pleasantness of a Kul'din is very well known. They are so genuinely hospitable, that nobody ever dares to take advantage of them. They are pretty much the epitome of peaceful solutions. Rumour has it that the Kul'din leader was able to calm down a Nu'kyoabe warchief, and able to convince him to leave the territory alone, one that was about to become a slave camp for the Kul'din themselves. Calming down a Nu'kyo is already a great enough task, but convincing one to return home without spoils is almost completely unheard of.
Trade is their forte. With beautifully woven silks and very unique spices, the Kul'din were able to establish themselves a very very rich peoples.