Interlude
Interludes are chapters narrated from the point of view of a different character to the main narrator, Taylor (excepting two arcs, all normal chapters are from her point of view). This is not always the same character throughout the interlude. They are normally in third person as opposed to the usual first person. Interludes occur at the end of each arc, and Wildbow has added more in the middle as Donation bonuses, released whenever a certain donation milestone is reached.
Normally, interludes don't repeat a certain character (except for Armsmaster , who reappears in an epilogue with Dragon as Defiant, his later name). They are important to the main storyline - Cauldron was first revealed in an interlude, and the interlude from Scion's POV is incredibly relevant to the following chapters. Often, they are used to further the plot in ways the main characters don't realise, or simply to add colour to the Wormverse . Many interludes feature characters who were considered as protagonists for Worm, and so they are very detailed and have interesting backstories rather than simply being plot dispensers.