houses and princes
The House of the arcane university, they are the ones who make the laws that regulate magic. They are in some ways the most powerful house because almost every member of the house is a powerful wizard or sorcerer, though they do let non magic users join sometimes. They tend not to get involved in the wars of the other houses, and like to think of themselves as above the petty squabbles of the other houses, because of this, the other houses hate them and frequently seek to undermine them.
It should be noted that most wizards and sorcerers are not members of Sinret