What are the ingenious foreshadowing and details in Harry Potter?

At the beginning of Harry Potter and the Order of the Phoenix, Harry and his cousin Dudley were attacked by dementors, and later they retired successfully. Penny Menstruation said she knew about dementors, a creature of the magical world. Harry wants to know how menstruation knows dementors. Menstruation says, "That terrible boy …" Harry is dissatisfied and thinks she has a problem with his father Zhan Mu.

However, in the last movie Harry Potter and the Deathly Hallows, Snape will find that Snape and Lily mentioned dementors in a chat, and at the same time, Penny in the distance is eavesdropping on their chat.

Linking these two stories together, we will find that "that terrible boy" is actually Snape.

Extended data:

The main characters in Harry Potter:

1, Harry Potter

The protagonist, born on July 3rd1,1980, is the only son of the wizard couple James Potter and lily potter. Is he enoch? Descendants of Pifre (confirmed in the dialogue between King's Cross Station and Dumbledore), and the villain Voldemort in the book is Kadima? Pivre is descended, so they have the same ancestor.

Harry has black hair and green eyes. Just like his father, his black hair always hangs around, and he has the flying talent of the Potter family. This pet is a gift from rubeus hagrid, the key keeper of Hogwarts, on his eleventh birthday-Hedwig.

When he was a baby, Voldemort tried to murder him. Voldemort's magic rebounded because his mother sacrificed magic protection. He became the only person in history who escaped the curse of death, leaving a lightning scar on his forehead. At the age of seventeen, I finally got rid of the underage magic detection spell.

After he found that he and Voldemort could not coexist in the world, he followed Dumbledore's guidance and fought Voldemort, but he became the most unpopular wanted man in Voldemort's Ministry of Magic. Later, he returned to Hogwarts in the final battle of the seventh episode, winning the support of most professors and students and defeating Voldemort.

2. hermione granger

Born in 1979, 19 September, from a muggle family. In the book, she appears as a smart girl who likes academic research and knows everything, and sometimes she seems to be arbitrary. Her knowledge proved useful in many of their adventures. The only major she doesn't like is divination, which is considered as "inaccurate" knowledge. When Hermione arrived at Hogwarts, she quickly became the cleverest student in the whole grade.

She not only knows the answer to every question, but also remembers the contents of every book she has read, and is willing to tell others her knowledge. Therefore, she won the nickname "Gryffindor know-it-all" shortly after her school career began, and she was famous for raising her hand actively to answer questions in every class and never taking pains.

3. Ron Weasley

Harry's best friend at Hogwarts was born on 1 March, 9801day, and is a comic book character. The Weasley family is an ancient pure blood family, and they all have fiery red hair.

Ron's father was an employee of the Ministry of Magic who abused Muggle artifacts. His salary is not high and he has many children, so Ron's family is not rich. Most of his things are used. He is very concerned about this. He and Harry were good friends and finally married Hermione.