What is the name of the main villain in J.K. Rowling’s Harry Potter series?

The main villain in J.K. Rowling’s Harry Potter series is Lord Voldemort. He was born Tom Marvolo Riddle and adopted the name Voldemort as he pursued power, immortality, and control over the wizarding world.

Voldemort creates Horcruxes to divide and preserve his soul, making his defeat unusually difficult. His ideology centers on domination by witches and wizards of pure-blood ancestry, although his own family history is more complicated than that belief suggests.

The series often uses “You-Know-Who” and “He-Who-Must-Not-Be-Named” for Voldemort because many wizards fear saying his name. The character’s birth name and aliases are distinct, but they all refer to the same central antagonist.