Doreen Green (Earth-61340)

The history of Doreen Green diverged from her Earth-616 counterpart when Empire State University send her and a bunch of other ESU students into the past of 1962 using a time-displacement gun he received from his weird aunt who had recently passed away. In the past Doreen had come across time-traveling Doctor Doom, who had just recently been defeated by her in his relative timeline. Doom defeated all those who oppose him, including formerly unbeatable Squirrel Girl, and using a phone from the future with the offline version of Wikipedia stored on it, conquer the world with the knowledge of the future. Doom had ensured that no other heroes would rise to oppose him and transformed Earth into "Doom Planet".^[1]

Squirrel Girl had no means to oppose Doom alone, so had to live under his regime for decades until she finally reached the time she was originally plucked from. Wearing a Doombot armor she had found Cody and made him take both of them back into the past in 1962. Aiding her younger self in the very fight against Doom that she originally lost, the two of them were able to defeat him together and convince him to drop his plans for world domination as long as both Squirrel Girls kept his embarrassing defeat a secret. Doom then used his Time Platform to take the stranded ESU students back to their relative present. Old Lady Squirrel Girl decided to stay however, and saying a heartfelt goodbye to her younger self and confiscating Cody's time gun remained to live her retirement years in the 1960s.^[1]

During her time in the past of Earth-616 she would come across Doctor Doom of the relative "present" timeline and wreck his attempt to build an army of Doombots. However, one Doombot ran away and later became Vincent Doonan. ^[2]

Squirrel Girl eventually passed away of old age, leaving her time gun to be delivered to Cody, thus completing the time loop that had send to the past in the first place.^[1]

• Squirrel Girl's Costume