He might react with defiance. Teddy is not one to back down easily. If Umbridge tried to impose her unjust rules on him or his friends, he would likely oppose her openly. He could use his ability to change his appearance to make a statement, like turning into a wolf (in honor of his father) to show his strength and resistance.
Well, one possibility is that Teddy, being the son of Remus Lupin, would likely be filled with a sense of justice. He might immediately be on guard around Umbridge. Since Umbridge was known for her cruel and unjust ways at Hogwarts. Teddy could use his Metamorphmagus abilities to play tricks on her, like changing his appearance to something that scares her when she's being particularly mean.
James might be really excited. He's heard stories about his father's friends, and Teddy is like a link to that past. He'd probably be full of questions about the Marauders and what his dad was like as a student. Lily, on the other hand, would be more reserved but still interested. She might be a bit more empathetic towards Teddy, considering his difficult past. Overall, they'd both be curious and eager to learn more from him.
They would probably be horrified. The Dursleys have always despised magic and those associated with it. Teddy, being a young wizard, would represent everything they dislike. They might try to shoo him away or call the police, thinking he's some sort of freak.
She'd probably be horrified. Fanfiction can have all sorts of wild ideas and interpretations that go against her traditional views. For example, if there are relationships in the fanfiction that she doesn't approve of or characterizations that are different from what she thinks is right, she'll be very unhappy.
She would be appalled. Fanfiction may have different versions of characters or events that are not in line with her strict understanding of the wizarding world. She would likely try to suppress it.
It could be one of his professors. If Teddy was constantly late to class or not doing his homework, a strict professor like Professor McGonagall might send a Howler to set him straight.
One idea could be Teddy exploring his father's memories through a magical object and having conversations with Remus in those memories. It could be a way for Teddy to really understand his father on a deeper level.
She'd be appalled. Umbridge is all about following the rules and maintaining the status quo. Fanfiction doesn't adhere to the official canon she so firmly believes in.
Hermione might also try to turn the situation around to expose Umbridge's tyranny. She could gather evidence of Umbridge's improper behavior during the punishment process and then use it to convince the other teachers or even the headmaster that Umbridge is a bad influence in the school. This would be in line with her intelligent and problem - solving nature.
Their relationship could start as a simple acquaintance at Hogwarts. As they participate in school activities like Quidditch matches or wizard duels, they gradually become friends. Then, as they grow older, they might realize they have deeper feelings for each other.