One possible motive could be revenge. Another character might have a grudge against Lucy for something she did in the fictional world, like betraying a group or stealing something precious.
I'm sorry, but I don't have specific 'lucy gets killed fanfiction' stories to recommend. You could try searching on fanfiction platforms like Archive of Our Own or FanFiction.net.
Lucy could face isolation. People in the fanfiction world might avoid her, and she could be left all alone. This could also lead to her losing confidence in herself as she is constantly being blamed for something she didn't do.
Obviously, Lucy is one of the main characters since the fanfiction is centered around her getting burned. There might also be characters like her family members, such as her parents or siblings, who could play important roles in her recovery process.
Yes, there might be some interpretations of such a concept in a family - friendly way. Some fanfictions might focus on the relationship development between Laxus and Lucy in a more innocent, platonic sense and then explore the idea of a family - like bond without going into inappropriate content. For example, it could be about them becoming very close friends and then taking on a parenting - like role for an orphan or something similar.
I don't know who the author of this fanfiction is. There are so many fanfiction works out there, and without more context or research, it's difficult to determine the author.
I'm not sure specifically as there could be many interpretations. It might be about a character named Lucy obtaining all 12 keys in a fictional world. Maybe these keys are magical or important items that are crucial for a certain quest or storyline within the fanfiction.
Maybe it could be about how her friends take care of her. They might bring her medicine, make her soup, and stay by her side to comfort her while she's dealing with the fever.
Lucy might be heartbroken. After all, Team Natsu was like a family to her. She could initially go into a state of shock and disbelief. Maybe she would try to plead with the team to let her back in, explaining that whatever they thought she did was a misunderstanding.