One common theme is loss. Whether it's the loss of a loved one, like in many stories where one of them dies. Another theme is sacrifice. For example, Astrid or Hiccup might sacrifice their own happiness or safety for the other.
One great piece of tragic Astrid and Hiccup fan fiction is 'Faded Memories'. It shows a world where Hiccup has lost Astrid in a battle and is struggling to come to terms with her loss. The way it describes his pain and the memories they shared is really heart - wrenching.
In the fanfiction, perhaps there's a moment when Hiccup gets injured while protecting the village. Astrid stays by his side day and night, taking care of him. She reads to him, makes him his favorite food, and in those quiet days, they realize how much they mean to each other. Their love deepens as they share these tender moments.
It develops gradually. At first, they might be just friends who respect each other's skills. But as they go on more adventures together, they start to notice little things about each other. For example, Hiccup notices how Astrid is always the first to volunteer for dangerous tasks because of her bravery. And Astrid sees how Hiccup's intelligence always gets them out of tough situations.
Their relationship might become more equal in some ways. As dragons, they are both facing a new and strange existence, so they have to rely on each other more. They might develop a new understanding of each other's strengths and weaknesses.
One possible fanfiction could be about how Hiccup and Astrid deal with the pregnancy. Hiccup might be overprotective, constantly worried about Astrid and the baby. Meanwhile, Astrid could be trying to keep up with her normal Viking duties while also preparing for motherhood. And the lemon element could be a symbol in the story, perhaps it's something Astrid craves during her pregnancy, leading to some humorous or heartwarming scenes between her and Hiccup as he tries to find the perfect lemon for her.
Astrid might initially be in shock. She could just stand there, frozen, unable to believe that Hiccup is really gone. Her eyes wide open and her body trembling as she tries to process what has just happened.
Most likely not. The fan community values the original story's themes of friendship, growth, and adventure. A fanfic where Astrid kills Hiccup and Toothless as children is so far from those values that it would probably be frowned upon. It's like taking the story in a completely opposite and unappealing direction.
In fanfics, Astrid could be mad at Hiccup for various reasons. One reason could be that he breaks a promise to her. For instance, if he promised to help her train a difficult dragon but then backs out because he got distracted by another project. This would make Astrid, who values loyalty and commitment, mad at him. Another reason might be miscommunication. If Hiccup doesn't clearly express his intentions or feelings, it can lead to misunderstandings and Astrid's anger.