Loeb announced that Dawson is Claire Temple, "a Nurse who works at Night," as he said. In comics, Night Nurse's real name is Linda Carter but might have been too similiar to the real life Lynda Carter, who played Wonder Woman in the 1970s.
In comics, Claire Temple was a nurse that worked for Dr. Noah Bernstein, the man responsible for the prison experiments which gave Luke Cage his powers. At the time she was a divorce of Bill Foster (aka Goliath), and had a short-lived relationship with Cage that ended due to Temple's displeasure with Cage's dangerous career. She went on to become a doctor working in New York, and appeared in Brian Michael Bendis and Alex Maleev's Daredevil run.
Given Temple's comic ties to Luke Cage, it's possible Dawson-as-Temple might carry over to the announced Luke Cage series on Netflix.
A clip showing Claire taking care of the injured Matt Murdock after pulling him off the street.