Nadezhda "Nadia" van Dyne (née Pym) is a fictional superhero appearing in American comic books published by Marvel Comics. Created by Mark Waid and Alan Davis, the character first appeared in Free Comic Book Day 2016 Civil War II (July 2016). Nadia has been described as one of Marvel's most notable and powerful female heroes, being labelled as an asexual character with bipolar disorder.