Doreen Green / Squirrel Girl

Squirrel Girl (aka Doreen Allene Green) is a fictional superhero appearing in American comic books published by Marvel Comics. Her first appearance was in Marvel Super-Heroes vol. 2, #8, a.k.a. Marvel Super-Heroes Winter Special (cover-dated Winter 1991), in a story, plotted and drawn by Steve Ditko and scripted by writer Will Murray. Her ability to communicate with squirrels is surprisingly effective and has allowed her to defeat major supervillains. She joined the Great Lakes Avengers but left to move to New York City, where she served as nanny to Danielle Cage, the daughter of Luke Cage and Jessica Jones. In her solo series, the character splits her time between studying computer science at Empire State University and fighting crime both solo and as a member of the Avengers.

Murray desired to write a lighthearted superhero story as opposed to the often heavily dramatic tales that were the norm in mainstream comics at the time, which gave rise to his creation of Squirrel Girl.

The Unbeatable Squirrel Girl (Volume 2, 2015)
Issue #1

Released date: December, 2015

Marvel TL;DR
The Unbeatable Squirrel Girl in 2 Minutes

Season 2, Episode 12 Airdate: September 8, 2017