Doreen Green was born to Dorian and Maureen Green. She suffered a modification in her genes for unknown reasons that granted her squirrel-like abilities, which manifested predominantly in the form of a prehensile tail. When her parents consulted with a doctor, it was determined that Doreen wasn't a mutant , even though she believed so for a long time. When she was ten years old, Doreen discovered she could communicate with squirrels after overhearing one of these rodents in her window.
She subsequently saved this squirrel from being chased by a dog, and they became friends. The squirrel, who identified himself as Monkey Joe , encouraged Doreen to use her abilities to help people. Ever since then, Doreen began to fantasize about becoming a super hero, and came up with the alias of the "Unbeatable Squirrel Girl.
When she was fourteen, Doreen ambushed Iron Man in a California forest near Stark Enterprises Headquarters and hoped to impress the veteran hero, wishing him to take her under his wing as his sidekick. Unimpressed, Iron Man politely declined, when suddenly the duo was attacked by Doctor Doom in a large aircraft. Doom captured and subdued Iron Man, and began to fly out over the Pacific Ocean where he planned to dispose of Iron Man's body once he killed him.
Underestimating her, Doom left Squirrel Girl to her own devices. She devised a plan and used her ability to communicate with squirrels through an open door as the ship passed over the forest. Hundreds of squirrels answered her call and flooded Doom's ship, chewing through the wires, and swamping the evil dictator with their furry bodies. Iron Man was freed, they emerged victoriously, and the two heroes went their separate ways. Shortly after her fifteenth birthday, Squirrel Girl assisted the Hulk , who landed unconscious one day next to her treehouse in the middle of a fight against the Abomination.
(mh=_KP5_LDgUVj4bgKb)14.jpg "Woman in Nancy")
A concussion had blinded the Hulk, so he had to reluctantly accept Squirrel Girl's help. After swarming Abomination with squirrels, Doreen directed Hulk how to move to land punches and dodge attacks until the villain was knocked out. Squirrel Girl later relocated to New York City.
