Squirrel Girl is a fictional superhero appearing in Marvel Comics. Created by writer Will Murray and artist Steve Ditko, she first appeared in 1991. Her real name is Doreen Green, and she possesses the ability to communicate with squirrels and has enhanced agility and strength. Known for her upbeat personality and unique powers, Squirrel Girl often uses her skills to defeat villains in a lighthearted manner. She has faced off against notable foes like Thanos and Doctor Doom, showcasing her cleverness and resourcefulness. Squirrel Girl is also a member of various superhero teams, including the New Avengers.