Glass Knights

The elite military force of Sigil, the City of Glass. They are children, trained from birth to protect the members of the Circle of the Tar Kings.

The Knights, also known as "Tarboys," are trained from a young age to serve as household troops, body guards, and the city guard.

A Glass Knight always leads the Circle's mercenary army.

The Knights acquire the bulk of the force from the city's prostitutes. Part of the city's tax on brothels is a quota of "troops."