Lesser Fairies are all the species of faeries that aren't High Fae. Although immortal, they are not part of the ruling nobility. They can find work in High Fae manors or households. Often they have strange traits. Some common ones are wings, horns, and particular skin colors that makes them very far from the human likeness of the High Fae.
The Lesser Faeries are often considered, by the High Fae, to be less deserving because of their lower rank. This is the cause of a lot of injustices.