Spoiler She dies at the start of the movie, however at the end, around the credit sequence he uses the cyborg dudes timetravel device and screws around with everything, including saving her.
You can say he kills himself writing "The Green Lantern" scenario and kills the mute deadpool himself
If we go by her comic book counterpart, she is known as 'Copycat' and has the power to copy powers. One story line, she dead in front of deadpool, she come back because of deadpools powers, but she lost her memories.
*Half way through the movie* I want to cringe about the gift of Deadpool to girlfriend, ultra toxic item. Also wtf, deadpool shot first the underling and not the big bad guy of the institution. Also wtf with their reaction speed. Can you react so fast to being shot at ? Like they knew they were gonna be shot at. Also sure, enemy say he come from the future but doesn't explain shit about the reason he want to kill the kid. It looks like a good reason but nooooo doesn't explain even though Deadpool keep blocking him. It's not like he got an explosive on him that will kill him if he reveal the truth.
Not only one girl died unfortunately. A terrible tragedy ended the next shooting day of the second part of the superhero blockbuster "Deadpool". Professional stuntman Joy Harris died while performing one of the motorcycle stunts. This was reported by the local police station of Vancouver, in which the project team is currently working. According to witnesses, the girl lost control and crashed into a showcase high-rise Shaw Tower.