The entire conflict between Percy Weasley and his family starting in Harry Potter and the Order of the Phoenix, is absent from the films. It plays a significant role in the books, with the first three books leading up to the fact that Percy puts his career success or academic success ahead of everything else and the fourth book indicating that Ron was quite certain Percy would sell out his family the same as Barty Crouch had done to Barty Crouch Jr. if it meant getting ahead in the workplace. The conflict is being repeatedly in instances such as Christmas break where Rufus Scrimgeour comes or the moment when Arthur Weasley is attacked by Nagini and Percy does not come to the hospital, and of course the time that Ron, Harry, and Hermione break into the Ministry of Magic using disguises and see Percy Weasley on the elevator blatatenly ignoring his father. In the films, Percy is shown regularly in the first three, although he is hardly identified as a Weasley, shown to be very pompous, and never interacting with his family, Harry, or Hermione. From there on he seems noticeably absent until he finally climbs through the portrait hole in the last film and joins his family in the fight.