>>84234291She has no in-universe connection with either Gwen Stacy or Deadpool.
She's a girl from our world called Gwen Poole that, after Secret Wars, was transported in Earth-616.
Being a comic fan, she understood that the only way to survive in that world is by being a superhero, because otherwise you would just be casualties in the new Marvel event, so she went to a person known for make superhero costumes and commissioned one
The tailor read her name and thought she was connected to Deadpool, so her costume was made to look like his
