Talk:Human/@comment-34756840-20180723002940/@comment-45.56.46.26-20180728145532

The main human races; humans, elves, and dwarves. are supposed to be capable of interbreeding and incapable of gaining race levels.

Demi-humans are incapable of interbreeding with humans and different demi-human species, but can interbreed with sub-types of their own species and can gain race levels and advanced race levels related to their own species type.

Heteromorphs apparently vary in their ability to interbreed with humans and demi-humans, at least some types of heteromorph can produce offspring with humans and possibly certain demi-humans, and while Demiurge is readily familiar with the impossibility of humans and demi-humans interbreeding, he has no objection to the idea of Ainz producing children with Albedo or Shalltear. This suggests that such inerbreeding between some types of heteromorph are indeed possible. From a setting perspective, it would seem that a succubus should be able to get pregnant with a child fathered by pretty much any species. Shalltear, being a True Vampire (i.e. born from a True Vampire), should be able to bear children despite being undead, and may have the ability to bear the child of any undead (this would be the most likely source of her necrophilac setting, Peroroncino is not into absolutely all fetishes as indicated by his discomfort having his sister's voice in erogames).

There are characters with elf-human mixed ancestry as well as those with human-dragon ancestry. There is a suggestion that some southern human races have mixed blood as a commonplace, but the species mixture is not known and would be hearsay anyway.