Vanessa Carlysle, also known as Copycat, is a fictional character in the Marvel Comics universe. She first appeared in The New Mutants #98 in 1991 and was created by writer Fabian Nicieza and artist Rob Liefeld. Vanessa is a mutant with the ability to mimic the powers and physical appearance of others, making her a formidable opponent. In the comics, Vanessa has been associated with various characters, including Deadpool, with whom she shares a complex romantic relationship. Over the years, she has appeared in multiple storylines, showcasing her skills as both an ally and an adversary. Vanessa's character has been adapted into other media, including the Deadpool films.