The Mikaelson family, also known as The Originals, were undeniably the standout characters in The Vampire Diaries as well as their own spinoff show, even though their characters evolved significantly in both series. Klaus, Elijah, Rebekah, Kol, and Finn were first introduced in TVD as formidable protagonists - immortal, unstoppable, and centuries old. They left Mystic Falls on their own terms because they were unbeatable by the other characters. Esther, their mother, created the Original vampires to protect her children after the death of Henrik. This decision inadvertently changed the course of history as they became the first vampires who sired the entire vampire population.

They were then given their own successful spinoff called The Originals, where their characters were further explored. The show also introduced new characters like Hope, Dahlia, and Freya, expanding the Mikaelson family tree. The portrayal of The Originals' power differed between The Vampire Diaries and their spinoff. While they were formidable in both shows, The Originals showed them in a more dominant light. Klaus, Elijah, and Rebekah, in particular, were shown to be incredibly powerful and capable of taking on large groups of enemies on their own. The Mikaelsons' personalities also underwent significant changes. Initially villains in The Vampire Diaries, they became more sympathetic characters in The Originals. Klaus embraced fatherhood, while Rebekah showed a more caring side. Elijah, on the other hand, had a darker past that was revealed in The Originals. Ultimately, The Originals showcased the Mikaelson family's transformation from villains to heroes, a transition that was well-received by fans.