Colleen Wing is a fictional character in the Marvel Comics universe, first appearing in 1974. She is a skilled martial artist and swordswoman, often associated with Iron Fist and Luke Cage. Colleen is known for her strong sense of justice and her dedication to protecting the innocent. In the comics, Colleen is of Japanese descent and has a rich backstory that includes her training in martial arts and her connection to her family's legacy. She has appeared in various comic series and adaptations, including the Netflix series "Iron Fist," where she is portrayed as a key ally to the titular character.