Carol Danvers is a United States Air Force pilot who, after gaining cosmic powers, became the super-heroine Captain Marvel.
As Thanos eliminated half of the universe's population with a snap of his fingers using the Infinity Stones, Nick Fury saw the situation unfolding on Earth as he witnessed Maria Hill and several civilians fade away into dust, and quickly grabbed a pager to send out an emergency alert in response.
Moments after, Fury himself turned to dust as well, dropping the pager which eventually displayed Danvers' symbol, having successfully sent the message.
Real Name: Carol Danvers
Portrayed by: Brie Larson
Father: Joseph Danvers
Brother: Steve Danvers
From the Comics
In the comics, Carol Danvers obtained powers after a fusion of Kree and human genes, assuming the code names Ms Marvel, Binary and Warbird before becoming Captain Marvel.