Their friendship develops through shared danger and mutual support.
Harry and Ron rescue Hermione from the troll, after which the three affirm their friendship.
Their initially awkward relationship becomes part of the central friendship group.
Ron insults Hermione, but later helps Harry rescue her from the troll; the incident brings the three students together.
Their relationship is defined by house-based student rivalry.
Hermione belongs to Harry and Ron's Gryffindor friendship group, while Draco belongs to the opposing Slytherin circle.
They are connected through their house and shared school achievement.
Neville belongs to Gryffindor and is rewarded with the others for the group's heroism at the end of the school year.
Explore the full interactive character relationship map of Harry Potter and the Philosopher's Stone
Related entry on Wikidata (Q174009), public domain (CC0).