Who might accompany Harry Potter when he gets a flu shot in the fanfic?

Well, in this fanfic, the setting of getting a flu shot could be really interesting. It could be at a Muggle hospital that Harry and his friends visit secretly. The nurse giving the shot might be completely unaware that she's dealing with a famous wizard. Harry might be thinking about all the potions he's had at Hogwarts and comparing them to this strange Muggle medicine. He might even wonder if there's a way to make a potion that works like a flu shot so that wizards don't have to go through this somewhat scary process.

Hermione would be a great candidate. She's smart and could research all about space magic before they go.

He could meet other young wizards and witches who are also working summer jobs. Maybe some from other wizarding schools.

Ron and Hermione are the most likely ones. They are his best friends and have always been by his side through thick and thin. They would probably follow him without hesitation and use their own skills, like Hermione's vast knowledge and Ron's loyalty and practical skills, to assist in the ship - stealing adventure.

There could be some new characters introduced in the fanfic. Maybe a powerful wizard from a far - off land who has heard of Harry's plight and decides to help. Or perhaps a group of outcasts in the wizarding world who see Harry as a symbol of their own struggle against the unjust system and come to his aid.

Maybe Dumbledore, if he were still alive in the fanfiction. Dumbledore was highly respected and had a great influence. Knighting Harry would be a way for him to publicly recognize Harry's achievements and heroism on a grand scale.

It could be someone who has been writing fanfics for a long time and wanted to take a very bold step with this concept. They might be a part of some underground or niche fanfiction circles where such unconventional ideas are more common. However, without more information, it's almost impossible to know for sure who the author is.

There could be some old family friends who come to see Harry at the manor. These friends might have known his parents well and can share stories about them. Also, it's possible that he meets some local witches and wizards who are associated with the Potter family. They could offer their help or give him warnings about the upcoming threats. And perhaps there are some magical beings like fairies or sprites that have made the manor's gardens their home and Harry encounters them during his stay.

Perhaps Madam Pomfrey, the school nurse at Hogwarts. Even in a fanfic, she would be the most likely person to take care of an injured student like Harry. She has the skills and the supplies to properly bandage his wounds.

Hermione would be a likely candidate. She's always been there for Harry and is very empathetic. She would probably offer him some words of wisdom and a shoulder to cry on.