One challenge could be trust. Since she has a child, Bella might be more guarded. She needs to be sure that Edward is not just passing through but is truly committed. Another challenge is time management. With a child, she has a lot of responsibilities, and finding time for a relationship with Edward might be tough.
Well, it could start with a chance encounter. Maybe Edward sees Bella and her child at a park and is immediately drawn to them. He starts to engage in conversations with Bella, getting to know about her past and her life as a single mom. As they spend more time together, he shows her a different world, a world full of love and support that she might not have expected, and thus their love story unfolds.
Edward in the 'Edward Tumor Twilight Fanfic' might be portrayed with some unique characteristics. Maybe he has to face the challenges brought by the 'tumor' aspect in a way that is different from the original Twilight story. It could add a new layer of complexity to his character.
Edward could be an ordinary man living in a small town. He has always wanted a family of his own but couldn't find the right partner. So, he decides to adopt a child to start his own family unit.
I don't have enough information to say exactly who he is. He could be the main character of the story, a person with his own dreams, hopes and problems. Maybe he is a kind - hearted man who loves Christmas and spreads joy during the festive season.
One of the main characters might be Alice. Her ability to see the future could be crucial in helping Edward navigate the political and dangerous situations in his role as king. Also, Jasper could be there. His experience in combat and control of emotions could be useful for Edward's rule. And then there's Rosalie, who might have her own opinions on how Edward should run the kingdom and could be a source of conflict or support depending on the story.
Edward would probably be very confused at first. He would try to understand why Bella would leave him for Rosalie. He might start to analyze all their past interactions, looking for signs that he missed. Eventually, he could become angry, not at Bella directly, but at the situation. He might also feel a sense of betrayal, not just from Bella but also from Rosalie in a way, since Rosalie is 'taking' Bella away from him.
It could be that there are external forces at play. Maybe there are other characters or some kind of dark secret in the fanfiction lore that forces Edward to leave Bella while she's pregnant. For example, there could be a threat from a rival group that says they'll harm Bella and the baby if Edward stays, and he thinks leaving will draw the danger away from them.
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.