Mei-Ling Zhou, simply known as Mei to her friends, was a well known Climatologist and adventurer. She was forced into cryostasis to survive a ecological event, remaining trapped for ten years. Then she was possessed by an ice demon.
Mei was well known and well liked for her eternal cheeriness, and helpful personality. She personally created numerous developments in climate control technology. For this, she was asked to join a UN monitoring station. She accepted, and was joined the small group in Antarctica.
Soon after Mei arrived, the station detected a massive storm developing directly above the Pole. As it approached, it made all communication impossible. The scientists decided to use experimental cryostasis technology to survive the duration of the storm, but all of them knew that the chances of surviving in stasis were low. They said goodbye, and entered stasis.
When the storm cleared, a UN team went to the base to look for survivors. Via radio, they relayed that they had found the cryopods - and then that they were under attack. A second team was quickly deployed, only to find the first team frozen statues. The cryopods held only dead bodies, apart from one: Mei's. Putting the facts together, the UN began searching the area for Mei, but they were unable to find her.
Over the next few weeks, other monitoring stations were attacked, covered by massive snow drifts and their inhabitants dead from severe frostbite or simply flash-frozen. What security footage was available showed a figure like Mei, but throwing ice and giving off an aura of extreme cold. That the attacker was Mei was confirmed when the vessel Shifter was attacked. Although all on the ship died, the omnic captain's data-banks revealed a short conversion with Mei, who claimed to be "Shuāng." She also declared she was attempting to "bring about the balance" by "forcing the return." This has been taken to mean she is attempting to cause an ice age: greenhouse emissions, and modern climate control technology has made such an ecological event impossible.
Since information about Mei, or "Shuāng" was leaked onto the internet by yours truly, many theories have been put forwards about her survival. Some believe she has, either accidentally or on purpose, been infected with nanobots capable of controlling the temperature. Other Mei has been replaced by a omnic, or an alien. The strangest theory, put forward by a user under the name Mort, states that Mei has become possessed by a demon, the so called "Shuāng," that was trapped under the antarctic ice cap. Mort has never given proof of his theory, and when asked he only replies "You'll see."
Antarctica is a country abandoned: all it's inhabitants have been evacuated, and a three mile exclusion zone stops anyone getting close. But it may need to be bigger; the ice cap is expanding, gaining half a mile a year. Mei is expanding her domain, and if left unchecked, frost will cover the world.
Why an ice demon? Cause why not. Also Mort is my hero idea, that I may do a story about. Sorry about the posting gap, had writers block.