Professor Minerva McGonagall, a highly regarded teacher at Hogwarts School of Witchcraft and Wizardry, first appears at Four, Privet Drive in the movie adaptation of Harry Potter and the Sorcerer's Stone. Later, she welcomes Harry and his classmates to Hogwarts and announces the upcoming Sorting Ceremony. Known for her strict demeanor and unwavering dedication to her students, McGonagall is a disciplinarian who despises rule-breaking. Her sharp tongue and calm expression allow her to deliver sophisticated insults with ease, making her a beloved character in the Harry Potter universe.
"They Are The Worst Sort Of Muggles Imaginable." - Harry Potter and the Sorcerer's Stone
In the opening of Harry Potter and the Sorcerer's Stone, Professor Albus Dumbledore encounters McGonagall in her Animagus form, a tabby cat, on Four, Privet Drive. McGonagall reveals that she has spent the entire day observing Harry's aunt and uncle, Petunia and Vernon Dursley, and thus feels well-equipped to form an opinion about them. As Dumbledore prepares to leave baby Harry with the Dursleys, McGonagall expresses concern and suggests that he reconsider, subtly indicating that in her opinion, the Dursleys are the most unpleasant non-magical family. She appears uneasy at the thought of condemning The Boy Who Lived to a difficult upbringing in their care.
"Five Points... Will Be Awarded To Each Of You. For Sheer, Dumb Luck!” - Harry Potter and the Sorcerer's Stone
Upon bursting into the girl's bathroom with Professor Snape and Professor Quirrell, McGonagall is surprised to find Ron and Harry standing over a defeated mountain troll. Demanding an explanation, Hermione takes the blame for the situation, admitting that she had purposely sought out the troll. As a result, Gryffindor loses five points. However, McGonagall awards Ron and Harry five points each for their fortunate escape from the dangerous beast, highlighting their bravery while also reprimanding their reckless behavior.
"Perhaps It Would Be More Useful If I Were To Transfigure Mr. Potter And Yourself Into A Pocket Watch? That Way, One Of You Might Be On Time." - Harry Potter and the Sorcerer's Stone
Harry and Ron arrive tardy to their Transfiguration class, only to discover that their professor has transformed into her Animagus form, a cat. As she shifts back into human form and begins to lecture, Ron attempts to charm her with flattery. However, McGonagall rebuffs his efforts and instead suggests transforming them into pocket watches to prevent future tardiness. This moment from Harry Potter and the Sorcerer's Stone showcases McGonagall's clever use of sarcasm and timing to make her disdain for latecomers known.
"Then Perhaps A Map? I Trust You Don't Need One To Find Your Seats." - Harry Potter and the Sorcerer's Stone
As Harry and Ron stumble into the classroom, trying to come up with an excuse for their tardiness, McGonagall wastes no time in providing a solution. She suggests transforming them into a map, which would make it easier for them to find their way around. The boys are amazed as they watch her effortlessly change form, leaving them speechless and unable to protest. With a hint of sarcasm, McGonagall gives them directions to their seats before taking her place at the front of the class.
"You see, Honorable As Your Intentions Were, You Too Were Out Of Bed After Hours." - Harry Potter and the Sorcerer's Stone
When Draco Malfoy informs McGonagall that he has spotted his classmates and rivals, the Trio, sneaking around Hogwarts, McGonagall handles the situation with her signature tact. She takes immediate action and deducts one hundred and fifty points from Gryffindor, slapping all of them, including Draco, with detention. Draco questions her sentence, but McGonagall remains firm and orders him to join his classmates in detention, reminding him that he too is guilty of the same mistake.
"But I Must Impress On Both Of You The Seriousness Of What You Have Done. I Will Be Writing To Your Families Tonight, And You Will Both Receive Detention." - Harry Potter and the Chamber of Secrets
After being blocked from the entrance to Platform 9 3/4 by Dobby, Harry and Ron took matters into their own hands and decided to fly the enchanted Ford Anglia to catch up with the Hogwarts Express. Unfortunately, Ron's driving skills were less than stellar and the car began to break down before they crash-landed into the Whomping Willow. Despite Severus Snape's outrage at their reckless behavior, he was unable to take any real action against them due to their house affiliation. Ultimately, it was up to Professor McGonagall to decide their punishment, which included writing to their families and assigning them detention. While Snape protested, McGonagall remained steadfast in her approach to discipline and teach her students.
"That Wand Needs Replacing, Mr. Weasley." - Harry Potter and the Chamber of Secrets
After Ron's wand is broken in a collision with the Whomping Willow, it becomes a hindrance throughout the rest of the movie. In McGonagall's Transfiguration class, Ron embarrasses himself when he is selected to demonstrate the Vera Verto spell. Instead of transforming Scabbers into a water goblet, Ron turns him into a furry cup with a wriggling rat's tail.
Upon witnessing Ron's debacle, McGonagall gracefully suggests that he replace his broken wand and continues with her lesson. Rather than criticizing Ron's skills, she simply advises him to acquire a new wand.
"Potter, Take Weasley With You, He Looks Far Too Happy Over There." - Harry Potter and the Half-Blood Prince
As Ron and Harry are enjoying a free period, McGonagall interjects with a sassy comment in the sixth Harry Potter movie. She instructs Harry to spend his free time with Professor Horace Slughorn's Potions class. However, McGonagall doesn't just stop there. She also insists that Ron accompany Harry, despite his apprehension towards the subject. Nonetheless, Slughorn assures Ron that he will take care of him.