Squirrel Girl was created by Steve Ditko and Will Murray.
Squirrel Girl is a peppy and hyperactive teen, whose energy seems almost endless. She seems extremely sure of herself, and almost deluded as to the fact that despite her age, she can be a powerful superhero.
Powers and Abilities
Communication with Squirrels: Squirrel Girl can control squirrels, and make them do her bidding in tough situations.
Leaping/Climbing: She can also move in agility much like that of a squirrel, which is limited too slightly faster running speed, and jumping higher.
Squrriel Girl's name could be seen on one of the news tickers promoting her new line of perfume. Later, when Spider-Man checked if he was still the number one superhero in New York, he's shocked to find himself listed on the 15th place of a poll. Behind Dazzler, Hawkeye, Nova and Squirrel Girl. While he knows Hawkeye and Nova, he wonders who Squirrel Girl is. She tries to stop Juggernaut's rampage with her Squirrel Army, which she succeeds. However, with collateral damage to the streets, where Spider-Man swings in and scolds at her for so, saying it doesn't make her a hero, but she said that people can and ran away into the distance.
In the episode "Nightmare on Christmas", she appears in a S.H.I.E.L.D base hibernating with her squirrels when Spider-Man comes in and asks her where his teammates are.
In the episode "S.H.I.E.L.D Academy", she's seen as a student at the Triskelion.
In the episode "Burrito Run", Squirrel Girl sneaks out after hours for late-night burritos with Spider-Man and Power Man, and along the way, they must contend with some of Spider-Man's enemies.