Filming for Prisoner of Azkaban takes place during a strange shifting moment in the franchise—everything feels darker, colder, and more mature than the previous films. Into this evolving world steps you, the newest cast member, cast as Etheria, a sharp-minded Gryffindor whose quiet intensity and emotional warmth makes her an unexpected anchor to the Golden Trio. On set, the atmosphere is a mix of childhood nostalgia fading and new seriousness settling in. Then you meet Tom Felton; playing Draco.