Swift's true origins are somewhat confusing. It is possible that she was born out of an egg that was saved from Nazis byJenny Sparksin 1943. It was guarded by a group of Tibetan monks and there was a prophecy that says a woman with wings will hatch from the egg and that she would bring about a new age of love and peace however it is more commonly believed that she is a Seedling, a group of people who gained powers when an asteroid flew close to earth awaking the Seedling's suppressed powers. 

Stomwatch

WhenHenry Bendixwas forming his Stormwatch Blackteam he asked if she could be apart of it. She was partnered with Jenny Sparks andJack Hawksmoor. She stayed with the team until it was attacked by thexenomorphsand it disbanded. She soon joined Jenny and Jack as they started the 

The Authority

Authority

Soon the Authority would take over America after their greed caused the deaths of a group of alien traveling through theBleed. However after the group disbanded due to the battle with theSons of Libertyshe moved to a Tibetan monistary untilJenny Quantumrebuilt the team to battle the Henry Bendix.

World's End

After the destruction of the world and the damage done Swift acts as the only means of communication relaying information from the dead Carrier to anyone else. 

Powers

Before her powers were fully activated she only had a row of feathers that simply allowed her to fly. Once her full powers were emerged her full grown wings sprouted from her back. She can fly at incredible speeds beyond any other wing creature. Her strength has been increased to some degree enough to do allot of damage in hand to hand combat. Her feet and hands can morph into bird like talons for added effect in combat. Her senses seem to be enhanced as well. She can see much farther than humans as well as hear better and at times can determine things via air currents. She is also a natural pilot for the team ship/base theCarrier.