Prospit

Also called The Light Kingdom, Prospit is one of the two kingdoms in Sburb. Prospit is a world connected to its moon by a gold chain, which orbits Skaia. It is where Jade is located in her dreams. The part Jade is on has two towers that resemble her home. the towers are dream bedrooms for dream Jade, and dream John. The larger part has 4 spires, much like those in the two kingdoms. Also, as Jade dreams about exploring the golden city on Prospit, we see an inhabitant who appears to be wearing a Harlequin hat. She attempts to make friends with one who looks strikingly like the Peregrine Mendicant. the kingdom is an intricate complex of golden bridges and building, filled with white-colored inhabitants with brightly colored clothing (similar to Parcel Mistress). It is possible that the Windswept Questant, who has a white carapace like the other Prospit inhabitants but bears a strong resemblance to the Glorious Monarch, is its queen.

Prospit likely has etymological roots in the word prosperity, which would contrast with Derse's name.

It is presumably the luminous planet that the Wayward Vagabond drew in the Skyship Base's northern wall. It and the Light Kingdom are almost certainly one and the same.

At the end of Act 4, Jack Noir destroyed much of Prospit, and sent its moon crashing into Skaia, where it was destroyed.

Hierarchy
The system of governement in place in the Light Kingdom seems to be a monarchy of sorts, as there is both a king and a queen.
 * Adored Sovereign: The queen of the kingdom. The Sovereign has been seen giving orders to Parcel Mistress, who is a mail worker; this implies that the queen oversees some of the public services in the kingdom.
 * White King: The king of the kingdom. Until recently the king has only appeared once in Homestuck. The queen gave orders to Parcel Mistress to seek the king on the battlefield and to retrieve his artifact (a scepter) which the king gladly hands to her.
 * Mail Workers: Assuming that Parcel Mistress is not the only postal worker, mailmen seem to be present within the kingdom.
 * Citizens: A few citizens were seen briefly in Prospit. They have white carapace (similar to their queen and to Parcel Mistress/Peregrine Mendicant) and colorful clothes that seem to display elements from the kernelsprites that have been prototyped so far.