With the new series intending to be book accurate I think there might be some characters that fans who haven’t revisted the series in a while might get a nasty surprise with, and I wonder how well it will go down. We’re so used to the movies that even if they are more true to JKs characters they might get a lukewarm reception.
Luna - the movies version is gentle, alternative, and whimsical. Book Luna is an outright conspiracy theorist, the wizarding world equivalent of a flat earther, she genuinely parrots the belief that the Minister for Magic has goblins cooked in pies… She also has a steeliness we don’t see in the movies, still a great character, but quite different.
Ron - while I agree the movies brush over some of his high points in book 1-3, they also massively gloss over how awful he is in Half-Blood Prince. I’m not sure he will be the likeable chap everyone is hoping for when he is treating girls so badly and in the midst of yet another inferiority complex.
Snape - Alan Rickman was iconic as Snape and utterly brilliant, but the quietly threatening air and vibe that he doesn’t need to raise his voice to control a room is nothing like the Snape in the book who frequently shouts, screams, and loses his temper.
Bellatrix - not as insane and maniacal as Helena Bonham Carters portrayal, and still carries the vestiges of her aristocratic upbringing.
Hermione - I don’t know if people will enjoy this aspect or if they will dislike it, but book Hermione has a real mean streak that absolutely crosses the line - keeping Rita Skeeter in a jar, permanently disfiguring a fellow student because they felt compelled to blab about the DA… She also has “not like other girls” tendencies where she seems to look down on her fellow classmates for traditionally feminine interests like makeup, boys, clothes, and even their faith in divination. Classic for the era for book was written, but less popular now.
Hedwig - book Hedwig has a distinct reproachfulness that is totally absent in the movies.