premise: Ron Weasley is part of the Harry Potter series as the eponymous wizard's best friend.
hypothesis: Harry Potter . The novels chronicle the life of a young wizard , Harry Potter , and his friends Hermione Granger and Ron Weasley , all of whom are students at Hogwarts School of Witchcraft and Wizardry . Ronald Bilius `` Ron '' Weasley is a fictional character in J. K. Rowling 's Harry Potter series . His first appearance was in the first book of the series , Harry Potter and the Philosopher 's Stone as the best friend of Harry Potter and Hermione Granger .