Hybrids are fairly common in Star Trek: [Spock][1] is half Vulcan, [Deanna Troi][2] is half Betazoid, [B’Elanna Torres][3] is half Klingon and, just for good measure, [Simon Tarses][4] is ¼ Romulan.

However, in all of these cases that I can think of, the other half is always human.

Are there any non-human hybrid characters? Especially ones that are recurring or at least the focus of an episode?

If not, is there an out-of-universe explanation for their absence/rarity/scarcity? From a fandom point of view, I can’t imagine a half-Klingon half-Vulcan might not make for an interesting story, for example.


  [1]: http://memory-alpha.wikia.com/wiki/Spock
  [2]: http://memory-alpha.wikia.com/wiki/Deanna_Troi
  [3]: http://memory-alpha.wikia.com/wiki/B%27Elanna_Torres
  [4]: http://memory-alpha.wikia.com/wiki/Simon_Tarses