Dianisian Empire

The Dianisian Empire is not really a unified state, but rather a federation of many smaller kingdoms, all of which are technically subservient to the Emperor but in practice are almost completely independent.

The Empire is named for Saint Diane of the Church of the Holy Light.

The North of the Empire is currently plagued by barbarian raids (Ch. 73).

Culture
Homosexuality is not considered that big of a deal in the Empire, at least for lovers. Marriage, however, is strictly between a man and a woman, though even then having a lover of either gender is not considered that big of a deal, at least for rich people.

Since political marriage is a thing, royals are actually pretty much the only one that are discouraged from having affairs,at least publicly. The rulers of the Empire are expected to have only one spouse, usually because said spouse is an important political figure they married for an alliance. Less important nobles are also usually careful with relationships though, because by law they have to financially support their bastards until adulthood. But many nobles actually like doing so, sending their bastards to either magical academies or knightly orders and paying for their education, in order to have magically powerful subjects in the future. Those who don't have enough money can send their bastards to temples. It is less desiderable because as clerics their first loyalty would be to their god and their order, but the ruler would still get a magically capable subject out of it without having to pay anything beside the initial (usually modest) donation.

Slavery is a cultural taboo in the Empire.

It's a social stigma to have short hair. Especially for young girls.

Kingdom of Dianisia
The King (or Queen) of Dianisia is also the Emperor (or Empress) of the Dianisian Empire.

The formal ruler of the Empire is currently an Empress... but she's little more than a representative figure.

Capital
 Alia  is the Capital of Dianisia and the Imperial Capital (Ch. 87).

Kingdoms under their banner

 * Kingdom of Castillar.
 * The Exarchate.
 * A theocracy ruled by the Church of the Holy Light.
 * Principate of Silax.
 * Principate of Veredantia.
 * Located in the Green Vale, it's the most agriculturally productive state of the Empire.
 * Principate of Parmenon.
 * Hosts the Imperial Fleet.
 * Duchy of Tremeria.
 * Duchy of Ludlan.
 * Duchy of Rasse.
 * Kingdom of Medelan.
 * Kingdom of Robur.
 * Kingdom of Praxia.
 * Principate of Melian.
 * Duchy of Lemar.
 * Principate of Tercia.
 * Kingdom of Norlan.
 * Kingdom of Tauton.
 * Famous for its mines.

Close allies and client states

 * Baelk Forest.
 * A client state of the Empire, inhabited by the Baelk, a race of tree people.
 * Free Cities of Becca.