Because of the mysterious nature of the Fair Folk, not much is known about the faeries of the Unseelie Court. They do not involve itself in outside affairs, such as the Shadowhunters or their Accords, and are not very interested in even trying to be in good terms with them. Their court is also said to be a terrifying place. Presumably because of this, Gabriel Lightwood referred to them as the nasty ones, most likely in comparison to those of the Seelie Court. Also, according to Sallows, Unseelie Court faeries do not like too much light.
- Much like Gabriel's reference to them as being "nasty," the Unseelie Court is often seen as the classification given to "evil" faeries; though since the Seelie Court has been known to be quite malicious, the Unseelie Court is usually seen as darker and more inclined towards unprovoked assault. However, the beings of the Unseelie Court are not always malevolent, but when an Unseelie faerie is forced to choose, they will naturally prefer to harm than help.
- Unseelie Court is often considered to be the combination of the Winter and Autumn Courts.
- The Court will be featured in The Dark Artifices. The Unseelie Court is ruled by the Unseelie King, who has several children; we are set to meet him in The Dark Artifices.