Diana Potter and changing the future

Diana Potter is sweet and smart. She loves her friends Hermione and Ron. She lost so much during the war and she decides to go back in time to her parents third year and change everything. Hermione and Ron want to come and help there friend. What happens when Diana catches Sirius Black's eye?

Hey guys, I'm going do a bit of some editing. I just want to fix up some confusion in some of the characters.