The commander of an Arkonian warship who orders Enterprise out of his territory and only reluctantly cooperates in rescuing Trip Tucker and the Arkonian pilot Zho'Kaan from a scorching moon.
Khata'n Zshaar appears in the Enterprise episode Dawn, set in 2152. He commands a vessel of the Arkonians, a territorial reptilian species with whom the Vulcans have a history of hostility.
After an Arkonian patrol craft shoots down Trip Tucker's shuttlepod over a moon, both pilots crash there. Zshaar's ship arrives, accuses Enterprise of trespassing and demands that it leave at once.
Jonathan Archer and T'Pol persist, pointing out that an Arkonian is stranded as well and that the moon's surface will become lethally hot at sunrise. Zshaar agrees to a joint search, and both men are recovered. T'Pol remarks that the humans achieved more with the Arkonians in a day than Vulcan had in a century.