Nimona features a stark class divide which acts as an essential factor in the events of the plot. The Kingdom is split into Nobility and Commoners. The former live in a clean, high-tech, affluent central region surrounding the Castle, defended by the Knights at all times, while the Commoners live in the further out underbellies of the city, still living lives which enjoy much of the technology of the region but lack the same wealth and opulence. There is a flip side to this: the Commoners are not subject to the same level of total surveillance the upper class of the Kingdom are. The technology of the Kingdom's somewhat limited prevalence to the Commoners also extends to the technology used by the government and its enforcement.
This class divide's most direct impact on the plot takes the form of one of its two protagonists. Ballister is the first commoner to become a Knight, an act which signals a closing of the gap between the upper and lower classes and the expanding fair representation in the systems of government. This is an act which sees some backlash from those with mistrust in Commoners within the Nobility, which is exploited by the Director in her political power grab. She uses this as an opportunity to tighten restrictions on the Commoners to more than that which came before. This fight between the two disparate wealth groups is one of the core conflicts of Nimona.