THE CHARACTERS Cho Chang | Harry Potter | _woaini | Canon AU | Go Ara | Hawaii ยป How are they different from their canon?
Long story short, Cedric Diggory barely dodged the killing curse and played dead when he and Harry were pulled to the graveyard during the third task. Harry managed to escape, brought Ced's "body" back with him, and thus unfolded a series of events where the Ministry actually believed Harry, real measures were taken to protect the students of Hogwarts AND, even though eventually things went to shit after Dumbles died, they won the second war. What this means for Cho is that she was a lot less of a sad sack and much more helpful than she actually was in the books.
After she graduated, she joined the Order of the Phoenix, was part of a lot of missions regarding recovery of hostages taken by the Death Eaters and after the war, became a liaison between the British and Chinese Ministries of Magic. She's now 24 and engaged to Cedric Diggory!