After the Second Wizarding War ended, Hogwarts needed a new headmaster, as shown in the Harry Potter series. But who succeeded Snape in the job?
In the Harry Potter series, Hogwarts School of Witchcraft and Wizardry has a new Defense Against the Dark Arts teacher every year, but the institution has also had its fair share of Headmasters. As the school’s ultimate authority, the Headmaster had final control over what occurred to students, professors, and other components of the institution. Albus Dumbledore was the Headmaster of Hogwarts for the majority of the book, and he not only helped Harry on his trip, but he was also someone who many of the staff and students looked up to. However, Dumbledore’s tenure as Headmaster would shift twice over the book. The first occurred in Order of the Phoenix, when Dolores Umbridge, a Ministry of Magic employee, was named Headmistress after Dumbledore took responsibility for Harry’s companions teaching themselves defensive magic and calling themselves Dumbledore’s Army (she would also become Headmistress in Harry Potter and the Cursed Child but in an alternate timeline). After his death at the hands of Severus Snape in Harry Potter and the Half-Blood Prince, Professor Minerva McGonagall was named interim Headmistress for the balance of the school year.
However, after Lord Voldemort assumed control of the Wizarding World in Deathly Hallows, Snape was appointed Headmaster to give Lord Voldemort control of the school. However, during the Battle of Hogwarts, Voldemort killed Snape, leaving Hogwarts without a Headmaster. Thankfully, the Board of Governors of Hogwarts appointed McGonagall as Headmistress, a position she still maintains in the current chronology of the series.
McGonagall handled the school’s restorations and the hiring of new staff following the Battle of Hogwarts, as is customary for a Headmistress. One of Harry’s buddies, Neville Longbottom, was hired as an Herbology professor. McGonagall would also be in charge of their schooling because several of the characters from the earlier books married and had children.
The primary heroes of Cursed Child, Albus Potter and Scorpius Malfoy were among them. McGonagall remained Headmistress even after Albus and Scorpius changed the past and altered the future for the first time. This meant she had a significant role in the play, assisting the adult versions of the cherished characters in rescuing their children when Lord Voldemort’s daughter threatened to change the future for the worse.
McGonagall also appears in various mobile games as Headmistress. She makes an appearance in Harry Potter: Magic Awakened, which is set ten years after the original book and before the events of Cursed Child and follows a new group of students at Hogwarts (it was released in other areas of the world in September last year). She also appeared in the now-defunct Harry Potter: Wizards Unite, which had a timeline of events that paralleled Cursed Child’s events and even had a special in-game event centered on her unhappy history.
Throughout these events, McGonagall demonstrates herself as a skilled leader capable of carrying Albus Dumbledore’s flame. It’s only natural that she’d be the one to take over the school. She had known Dumbledore for almost her entire life and was always loyal to him, but she also prioritized the safety of her students and promised to act in the school’s best interests. That also makes her a better Headmaster than him, as Dumbledore’s baggage and hidden motives were always blemished on his reputation.