Were there ever any “Native Antarcticans”, or how about any colonial powers hoping to colonize the continent? Would there any known reason to colonize it in the first place?
The Antarctic Treaty made it so countries can’t claim Antarctica or use it in nonviolent ways. What about beforehand. Did the British or Dutch ever decide to get another colony on the continent? Did any natives live on its coasts originally?
Antarctica is very inhospitable. There was never native settlement in Antarctica. Interestingly enough, there have been a handful of people born in Antartica but this has been done by flying pregnant women there for the purposes of giving birth.
Historically, the economically valuable activity in the Antarctic was whaling and sealing. Whalers and sealers established settlements on the various islands of the Antarctic region. These were mostly seasonal but there were permanent population centers -- for example at Grytviken on South Georgia. Whalers and sealers, however, had no reason to penetrate into the Antarctic continent itself given that they were pursuing marine life. Whaling was, however, a substantial industry employing several thousand people in South Georgia at its peak. The Antarctic Treaty defines Antarctica as beginning at 60 degrees south latitude. Some islands below this line hosted temporary whaling and sealing establishments but whalers and sealers did not establish permanent settlements this far south.
As the Antarctic became a focus of exploration and scientific activity, nations began to establish bases to support these enterprises in the Antarctic -- some seasonal, some permanent. Even permanent Antarctic bases, however, only host a transient population. Staff come and go, returning to their homes. No one would really call Antarctica "home." In 1903, the Scottish National Antarctic Expedition established a weather station in the South Orkney Islands (south of 60 degrees latitude thought not on the Antarctic mainland). They sold this to Argentina, which still operates it as Base Orcadas with a very small year round population, making it the oldest Antarctic "settlement".
Up to WWII, operations in the Antarctic were fairly minimal. During and after the war, the continent attracted some strategic interest. A German cruiser operated in the region early in the war, capturing some whalers and prompting the British to send their own naval response culminating in Operation Tabarin. Shortly after the war, the U.S. launched Operation Highjump which brought a 13 ship task force to the Antarctic and established a camp on the Ross Ice Shelf. None of this, however, amounted to "colonization" in any real sense.