Weaver cabal
Weavers are outside the social systems of Dawn. They are not nobles, but neither are they entirely yeomen. Their concerns are not the concerns of nobles, and they have more interest in the yeoman than the nobles do, but they are also politically influential and powerful. Were they to try and exert this power to destabilize the Dawnish way of life, however, they would almost certainly fail and face extreme sanctions. They weave a fine line between two worlds and msut be careful not to make a fatal misstep.
Nobles sometimes become weavers, but only those nobles who are effectively "retiring" from noble life ever really have any success in a weaving cabal. While the nobles are suspicious of the weavers, the weavers have no time for the "airs and graces" that nobles seem to employ. A noble is likely to assume they should be in charge of a weaving cabal, and that is simply not acceptable behaviour.