Perhaps they are characters in a modern - day wizarding world where they are both part of a secret magic society. Edward could be a powerful wizard from an old family who feels threatened by Harry's new - found powers. So, he decides to break Harry's heart to assert his dominance.
Well, it could be that Edward, perhaps jealous of Harry's popularity or a girl he likes, spreads false rumors about Harry. This causes Harry to be ostracized and his heart to break as he loses friends and respect.
Harry could be heartbroken. He might isolate himself for a while, not wanting to see anyone or do anything. Just staying in his room, crying and reminiscing about the good times with Edward.
One example could be when someone tries to bully Harry, and Edward steps in immediately to stop it.
Well, it could be that in the fanfiction's plot, Harry has some special qualities or is in a dangerous situation. Edward, being a character with his own set of values, decides to be protective. For example, if Harry has some sort of power that others might want to misuse, Edward would step in to safeguard him. It might also be related to their shared experiences or a bond that has developed between them over the course of the story.
He could be devastated. Edward is deeply in love with Bella, so he might go into a state of depression. He may isolate himself from his vampire family and friends, constantly replaying in his mind what went wrong in their relationship.
The Cullens from the Twilight series are obvious choices. They could interact with Harry in various ways. For example, Carlisle's medical knowledge and his calm, father - like presence could provide stability in a dangerous situation that Harry and Edward find themselves in.
Well, in the fanfiction, if we consider the people around Harry, the teachers at Hogwarts could be concerned at first. Dumbledore, being the wise figure, might see potential in the baby and encourage Harry. As for Edward's friends in the vampire coven, they would have mixed feelings. Rosalie might be jealous as she always wanted a normal life with a baby. Jasper might be worried about the baby's influence on their coven's stability. But overall, as time passes, they would adapt and form a new kind of community around the baby.
Another possible antagonist could be the Ministry of Magic. If they suspect Harry of something and force Tonks to spy on him or cut ties with him, it would break Harry's heart. The Ministry's strict rules and paranoia could be the driving force behind Tonks' actions that lead to Harry's heartbreak.
Yes, there could be such fanfictions in the vast world of fanfiction writing. Writers often come up with creative and unexpected crossovers. However, I'm not sure which specific fanfiction exactly portrays Harry as a creature and Edward's mate. You might want to search on popular fanfiction websites like Archive of Our Own or FanFiction.net using relevant keywords.
Well, in some fanfictions, the author might justify it by showing that Edward has a deeper, more primal connection with Bella. Maybe he realizes that his love for Bella is something he can't ignore, and that his relationship with Harry was more of a passing acquaintance or a misjudgment in the first place.