It could be that she challenged the teacher's theory too forcefully. Hermione is known for her intelligence and eagerness to prove her point, which might not always sit well with some teachers. For example, if the teacher was presenting a more traditional view on a magical concept and Hermione had new, radical ideas based on her extensive reading, the teacher might take it as disrespect.
Maybe Professor McGonagall. She was strict but also had a soft spot for Harry. She might take Harry under her wing more in this fanfiction and make him her 'pet' student. She could teach him advanced Transfiguration skills or involve him in Gryffindor - related leadership tasks that give him an edge over the other students.
Well, it could be that Nero accidentally breaks some important rule in his world. Maybe he accidentally damages a powerful relic that is crucial for his community's safety, and then he has to face the wrath of the elders or those in charge.
I'm not sure specifically as I haven't read that exact 'journeys teacher's pet story'. It could be about a student who is the teacher's favorite in a classroom setting, perhaps involving events that show why the teacher favors this particular student, like the student being extremely hard - working or having a special talent.
One common element is special treatment. The teacher's pet often gets preferential treatment like extra attention or privileges. Another is envy from other students. Also, the pet usually has a closer relationship with the teacher compared to their peers.
The 'teacher's pet' story often involves a student who is favored by the teacher. This student might get special treatment like being chosen first for tasks, getting extra praise, or lenient grading. It can create envy among other students. For example, in my class, there was a student who always sat in the front row and got to help the teacher with every little thing. The rest of us felt a bit left out at times.
Another consequence could be the loss of friendships. If she flirts with her friends' partners, it can create a rift not only in her own relationship but also in the friendships. Her friends may feel disrespected and cut ties with her. This can leave her feeling isolated and lonely. In some cases, if the flirting gets really out of hand, it could even lead to legal issues, like if it is considered harassment.
Peter could get a dog. A loyal dog would be a great companion for him, following him around during his daily life and even being a sort of sidekick. It could sense danger and bark to alert Peter when something was wrong.