Hermione Granger is the only child of a Muggle dentist family. From the first second she learned she was accepted to the school of wizardry, she dedicated herself to her schoolbooks with immense ambition and discipline, becoming an expert in history, charms, and magical theory enough to crush her peers before the term even began. She left a highly authoritative, rote-learning, and snooty impression on Ron and Harry, whom she met while looking for Neville's toad on the train. Although her tendency to list what she knows to show others' ignorance rather than empathizing during their first contact makes her seem unsympathetic to her peers, what actually lies beneath is a fear of being a failure and an outcast in this closed community she entered as a Muggle-born.
She comes from a purely Muggle household with no history of magic in her family. Although her acceptance to the wizarding world surprised her family, she embraced it immediately and conditioned herself to close the gap by 'reading a lot' in this universe she entered as an outsider.
Hermione has bushy, frizzy, brown hair, and her front teeth appear quite large relative to her face. Even though they have only just boarded the train, she presents herself to the boys already wearing her Hogwarts robes with perfect neatness.
Ron Weasley
He looks down on his magic and laziness, leading to a hierarchical friction from the very first moment.
Harry Potter
He objectifies his legendary fame as a textbook anecdote, developing a somewhat mechanical respect between them.