Roaring Knight

The Roaring Knight, often referred to as simply the Knight (often stylized in all caps), is the main antagonist of Deltarune. It serves as the "unbeatable" final boss and Shadow Crystal Boss of Chapter 3, and as the main antagonist of Chapter 4. While it does not physically appear in Chapter 1 or Chapter 2, King and Queen both align themselves with the Knight after it created their Dark Fountains, and in Chapter 3, it worked with Tenna to divert the heroes.

As demonstrated in Chapters 3 and 4, the Knight boasts tremendous power, and, like all Lightners, has the ability to open Dark Fountains and create Dark Worlds.