Claire Temple is a Marvel Comics character who mostly appears in the Netflix shows set in the Marvel Cinematic Universe.
Alongside Christine Palmer, Claire Temple is one of the Night Nurses. As such, she has dedicated her life to use her vast medical skills and knowledge of medicine to heal superheroes.
She is a recurring ally of the Defenders (Daredevil, Luke Cage, Iron Fist, and Jessica Jones).
As befitting a Netflix character, she can be quite violent and aggressive when the occasion calls for it, being able to handle herself quite well in a fight.