Spoiler
Show
Elves are extremely willing to pick a fight, will eat anything, and will sleep with anything (Most sentient creatures (that aren't Human, Orc, Dwarf, or Kobold) and higher intelligence monsters are the result of elven breeding). This is due to their near-extinction in the apocalyptic Titan War that overthrew a god.
Spoiler
Show
Humans and Orcs have mostly integrated their cultures, and the three civilized empires are rule by a noble class of vast polygamous clans (which date back to the titan war.)
The three empires also have fairly distinct cultures:
In the Holy Aprilian Empire, sex is treated as if it were any other art, being taught in the schools, and skilled prostitutes are treated much like rock gods or A-list actors. Slavery is illegal outside of the court system, where it is used for crimes that merit the death penalty but not being soul-bound to a golem. Due to strong Elven influence, cannibalism is legal, if disliked, and many judical slave wind up on the menu of elven restaurants.
In Markavia, group marriage (outside of the noble houses) is nearly unheard of, and unliscened magic use is a capital crime. They are also the only empire that borders the vast goblin lands, and thus being a goblin is usually also a capital crime.
Cinnabar trades slaves openly, and has a very strong seafaring tradition. It is, however, a capital crime to injure, eat, or otherwise mistreat a slave. Elves are widely distrusted and very rare.
Spoiler
Show
Goblins are actually a degenerate breed of Orc, descended from the survivors of those who kept faith with the evil god at the First Battle. Their culture is unknown, but they are extremely well armed and often launch raids from ships, or try to seize the only pass between them and the Empires.