
Gwen Poole arrived to the Marvel Universe from what she claims to be "the real world." Unwilling to be an "extra," she went to a tailor for super-heroes and requested her own costume to stand out. The tailor (named Ronnie) complied, but misread Gwen's application form, and thought Gwen went by the alias of "Gwenpool", leading to a costume similar to Deadpool. Ronnie chose pink because of Gwen's pink highlights, but also wanted her costume to stand out and get rid of her excess pink fabric. So far she has yet to reveal the details of her old life, though she told Rocket Raccoon that in this comic universe she is not lactose intolerant. All we know is that she felt erasing herself from her old life and her parents' memories was "for the best".