Voldemort, originally named Tom Riddle, is the primary antagonist in the Harry Potter series created by J.K. Rowling. Known for his quest for immortality and domination over the wizarding world, he is characterized by his snake-like appearance and the ability to instill fear in others. As a dark wizard, Voldemort is infamous for his use of dark magic and his followers, known as the Death Eaters. His obsession with purity of blood and hatred for non-pureblood wizards drives much of the conflict in the series, making him a symbol of evil and tyranny in the magical realm.