Well, it could be that her sickness is a result of some dark magic in Fablehaven. Maybe she was poisoned by a magical creature or a spell was cast on her. This would lead to her friends in Fablehaven having to find a cure, perhaps by going on a dangerous quest to find a rare herb or magical object that has the power to heal her.
Seth could be the one to help her. As her brother, he would be very concerned and might use his own knowledge of Fablehaven and its secrets to try and find a cure. He could also enlist the help of some of the friendly magical creatures they've befriended, like the fairies or the satyrs.
There could be many interesting fanfiction stories about Kendra in the Fablehaven world. One idea could be a story where Kendra discovers a new, hidden area in Fablehaven that has unique magical creatures. She might have to use her wits and the magical knowledge she has gained throughout her adventures to navigate this new area and make friends with the creatures there.
However, this could also be a story of her resistance. Kendra, being a strong - willed character, would likely fight against her enslavement. She could form alliances with other enslaved or sympathetic characters and work towards overthrowing the oppressors. This would involve a lot of character development and exploration of themes like freedom and justice.
In the 'joho gets sick fanfiction', it could be that Joho's illness is a mysterious one. His family and friends are worried sick. They search for a cure everywhere and in the process, they discover some secrets about Joho's past that are related to his current condition.
In the 'jace gets sick fanfiction', it might involve Jace getting a mysterious illness. This leads to a search for a cure, with his family and allies scouring the land for rare herbs or magic spells to heal him. They face many challenges along the way, such as dangerous creatures guarding the ingredients they need.
Maybe Sonic's friends will take care of him. They could bring him medicine and make sure he rests. For example, Tails might use his inventions to find a quick cure.
Maybe Kenichi gets sick just as a big tournament or important event is about to happen. His team has to decide whether to participate without him or wait for his recovery. This creates a lot of tension and internal conflict within the group.
Well, the plot could involve Robin's friends rallying around to take care of him. Maybe they bring him soup and keep him company while he's in bed recovering.
Well, one possible plot could be that Elsa's sickness is a magical ailment. Maybe she got it from using too much of her ice powers at once. Her sister Anna would then be worried sick and try to find a cure. She could search all over Arendelle and even beyond for someone who can help Elsa get better.
In the 'bendy gets sick fanfiction', perhaps Bendy has caught a strange illness that is affecting his ability to draw or create. His friends then embark on a journey to find a cure. They might face various obstacles along the way, like dark creatures or tricky puzzles. They'll have to use their wits and friendship to help Bendy get better.