Her family members could also be main characters. Her parents or siblings might be crucial in the story. They could be searching for her when she screams, or they could be the ones she's trying to reach out to for help. And there could be an antagonist as well, the one who caused her to scream for help in the first place.
There might be a mysterious stranger. This person could be passing by when they hear Amy Fleming's screams for help. They could have some special skills or knowledge that can assist her in whatever situation she's in. Another possible character could be an authority figure like a sheriff or a teacher, depending on the setting of the fanfic, who has the power to protect her.
Definitely Ty Borden. He and Amy have a special relationship, so he would be deeply concerned about her illness. He could be the one running errands, getting medicine and making sure she has everything she needs. Georgie could also be a main character. She could be helping Lou with the ranch work and also spending time with Amy, telling her stories to keep her spirits up. And then there's Spartan, Amy's horse. Spartan could be acting strangely because he senses something is wrong with Amy, and his behavior could be a part of the story as well.
Well, it could be about Amy Fleming being in some sort of dangerous situation in the world of the fanfic. Maybe she's lost in a spooky forest and screams for help when she encounters some strange creatures. Or she could be trapped in a building that's about to collapse and her screams are to alert others to her plight.
Amy Fleming and Ty are likely characters from a particular series or fandom. They could be characters who have a relationship, perhaps friends or more than friends. Without more context, it's hard to say exactly who they are in the grand scheme of things, but they must be important to the story if Amy is yelling for Ty.
Maybe there could be a neighbor who stops by. This neighbor could be an elderly person who has some old - fashioned remedies and shares stories with Amy while she's sick at home.
In the fanfiction, it might be that a mysterious figure is responsible. This person could have a vendetta against Amy's family or the stables she works at. They could set up a trap, like loosening a fence rail that Amy's horse jumps over, causing the horse to stumble and Amy to be thrown and badly injured.
It could be her family members. For example, her parents or siblings might be very concerned about her health and constantly trying to persuade her to take care of herself. They would be the ones using their love and concern to try and break through her stubbornness.
In the fanfic, her character could be shown in a more introspective light. Since she's confined to her bed with the flu, she has time to think about her life, her relationships, and her future. She might have flashbacks to important moments in her past and realize things about herself that she hadn't before. This could lead to some character growth once she recovers from the flu.
Her best friend could be a main character. This friend might be constantly by her side, bringing her schoolwork so she doesn't fall behind and also sharing the latest gossip from school or the stables.
The main characters are clearly Amy Fleming and Ty. Amy is the one who gets hurt and yells for Ty. Ty is the person she calls out to, likely someone she has a strong connection with, perhaps a romantic one.
In a fanfic centered around Amy Fleming's head hurting, it could be that she got hit by a small object while in the pasture. She starts to feel a throbbing pain in her head. Her horse seems to sense something is wrong and nuzzles her gently. Amy tries to push through the pain to finish her tasks for the day, but eventually has to admit she needs to rest.