Are there any Star Trek characters that are hybrids of non-human species?

Question

Hybrids are fairly common in Star Trek: Spock is half Vulcan, Deanna Troi is half Betazoid, B’Elanna Torres is half Klingon and, just for good measure, Simon Tarses 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.

Answer 1

Per Memory Alpha's article on "Hybrids"

• Betazoid / Tavnian (Lwaxana Troi's and Jeyal's child) (DS9: "The Muse")
• Cardassian / Bajoran (Mika and Dukat's child, and Tora Ziyal) (DS9: "Covenant")
• Cardassian / Kazon (Seska and Culluh's child) (VOY: "Basics, Part I", "Basics, Part II")
• Romulan / Klingon (Ba'el and several other prisoners in the Carraya IV colony) (TNG: "Birthright, Part I")
• Romulan / Vulcan (Saavik)
• Talaxian / Mylean (Neelix's great-grandfather was Mylean) (VOY: "Scientific Method")
• Talaxian / Mylean / Vulcan (Tuvix, was caused by a transporter malfunction with hybridizing flowers) (VOY: "Tuvix")
• Trill / Klaestron (Benjamin Sisko briefly assumed that Ilon Tandro was the son of Curzon Dax and Enina Tandro) (DS9: "Dax")

As to the scarcity of non-human hybrids, the simple fact is that the overwhelming majority of characters (especially those in committed long-term relationships where having children is likely) are human or part-human.

On top of that, many of the aliens that we see (Klingons, Romulans, Vulcans, Cardassians) view cross-species relationships, especially those that result in offspring as deeply unpleasant. While that's a fun well to dip for adult characters, watching children suffer isn't something that audiences want to do.

Answer 2

Yes.

You can find a full list here.

DS9

• Tora Ziyal is a Bajoran-Cardassian hybrid.
• In the DS9 episode The Muse, Lwaxana Troi and her husband Jeyal have a half-Betazoid half-Tavnian child.
• In the DS9 episode Covenant, Mika and Benyan have a half-Bajoran half-Cardassian baby.

TNG

• In the TNG episode Parallels, Worf and Deanna Troi have children who are half Klingon, one-quarter Betazoid, and only one-quarter human. (OK, there is some human in there, but neither parent was fully human.)

• In the TNG episode Birthright, Part I, Be'al and several others were Klingon-Romulan hybrids.

Voyager

• In the VOY episode Scientific Method, Neelix was a Talaxian-Mylean hybrid.
• Tuvix was a Talaxian-Mylean-Vulcan hybrid. (He wasn't created through ordinary means though, but by a transporter malfunction.)

Films

• Saavik was a Vulcan-Romulan hybrid.