The main characters might include a person or a community that is suffering from an unknown cause of sickness. They are the ones who are being made sick. On the other side, there could be characters who are either oblivious to the fact that they are causing the sickness or are deliberately doing it. For example, it could be a group of scientists conducting unethical experiments that are releasing harmful substances into the air or water, and the local people are the ones getting sick. Or it could be a family where one member's bad habits are making another member ill, like smoking indoors and causing respiratory problems for others in the family.
Since the title gives a sense of accusation ('We make you sick'), there are likely to be two groups of characters. One group would be those who are being affected, perhaps just normal individuals going about their lives. The other group could be the perpetrators. This could be a group of people who are careless, like neighbors who are doing something harmful without realizing it, or it could be a more organized group such as a company that is polluting the environment and making the local residents ill.
Ben himself would definitely be the main character as it's about him being sick. His Grandpa Max is likely to be there, as he is always looking out for Ben. Gwen, his cousin, would also probably be in it, trying to use her magic to help Ben get better or at least understand what's wrong with him.
Not having read 'a sick call short story', I can only guess. There might be a protagonist who is the one in need of care due to being sick. Then, there could be a supporting character like a doctor with his or her own backstory and motives for making the sick call. There may also be family members who play different roles, such as a worried mother or a stoic father, and their interactions with the sick character and the person making the call would form an important part of the story.
Probably the ancestors of the main characters in the original series. For example, the Potters' predecessors or the early Gryffindors.
The main characters might be those who are easily distracted. In the story, they could be constantly choosing to do more enjoyable but unproductive things instead of the tasks they should be doing. So they are likely to be characters who lack the ability to prioritize their time well and end up losing a lot of it due to procrastination.
Well, in most 'To See the Invisible Man' short stories, the main character is, of course, the invisible man. He is the central figure around which the story revolves. There may also be other important characters. For example, there could be a journalist who is trying to get the scoop on the invisible man. He would be curious and brave enough to dig deeper into the mystery. And then there might be a police officer or a local authority figure who is responsible for maintaining order in the face of this strange occurrence. These characters all play important roles in how the story progresses, with their different motives and reactions to the invisible man.
The main characters are most likely Miley Stewart and her dad. Since it's about 'Daddy's Girl is Sick', they would be the focus. Miley as the sick one and her dad as the caregiver.
Toriel is very likely to be involved. She has a motherly nature and would surely be concerned about Frisk's health. She would probably be at Frisk's bedside, offering comfort and warm food.
Obviously, Paul himself is the central character. His brother Reggie might also appear as he could be concerned about Paul's condition and offer support. Ash could be in it too. He might be someone who initially doesn't get along with Paul but then shows compassion because of his illness. And of course, Paul's Pokemon would be there, like his Torterra or Electivire.
All Might is another character that is very likely to appear. As Deku's mentor, he has a big influence on him. He would be concerned about Deku's health in relation to his quirk. Recovery Girl, the school nurse, would also be an important character. She would be the one trying to diagnose and treat Deku's illness.
There might be a kind - hearted doctor in the 'baby bella gets sick fanfiction'. The doctor would examine Baby Bella carefully, give accurate diagnoses and prescribe the right medicine. Also, her best friend could be a character. Her friend might visit her often and bring her favorite toys or books to make her hospital stay or time of being sick at home more bearable.