Physiology
The Kelan are compact, lean, and built for endurance in extreme cold and high altitude. They resemble the Ngorrhali in every way except scale. The faces are the same. The skin tone is the same. The difference is that the Kelan are much shorter and carry less mass, their frames compressed and stripped down for the specific demands of polar terrain rather than stratospheric altitude. Where the Ngorrhali grew massive under the conditions of Ngorrhal's passes, the Kelan adapted to Kela's frozen expanses by becoming smaller, tighter, and harder to kill through exposure.
Capability
The Kelan are skilled climbers with strong endurance in cold-weather operations. In an earlier era these abilities were distinctive. In the modern era they are not. Ngorrhali techniques accomplish the same functions at greater scale, and Yuvaari techniques accomplish them with greater versatility. What the Kelan do is an inferior version of what both populations already provide. This does not make them incapable. It makes them redundant in a world where the alternatives are available, and the alternatives are always available because Ngorrhali and Yuvaari are present in every major population center on the planet.
The Continent
Ethnic Kelans represent less than two percent of Kela's 700 million inhabitants. The overwhelming majority of the population came from somewhere else. The engineers are Jeyrhan or Geban. The bioengineers are Jeyrhan. The ex-warlords are Thazvaari. The criminals are from everywhere. The deep sea infrastructure was built by outside contractors. The autonomous colonies established in the Era of Late Conquest serve as refuges for outcasts and fugitives seeking distance from imperial oversight, and the people who run them are rarely Kelan. Every notable accomplishment associated with Kela comes from migrant populations operating on a continent the Kelan happen to inhabit.
The Kelan are hardy, enduring, and adapted to an environment that most populations would not survive. Their resilience turns deadly cold into home. These are admirable traits. They are not distinctive ones when measured against any population that has produced something beyond the ability to persist.