Guenièvre is a character from the anime and manga series Seven Deadly Sins: Four Knights of the Apocalypse, where she is reimagined from the legendary figure of Queen Guinevere from Arthurian tradition. She makes a brief but notable appearance early in the story, specifically in episodes eighteen and nineteen of the anime adaptation.

Her role is closely tied to the character of Lancelot, who is one of the main protagonists known as the Fox Sin. As in the classic legends, Guenièvre is linked to Lancelot through a romantic connection, and the narrative references this well-known liaison. She is also the queen of King Arthur, who in this series has become the ruler of Camelot and a powerful, complex antagonist.

One of Guenièvre's most distinctive traits is her ability to see into the future. This precognitive power is a key element of her role in the plot, as she provides crucial information to the group of heroes. For instance, her foresight reveals where the Four Knights and their allies will stay before they arrive at a walled town called Wolnack during its Requiem Festival. This prophetic ability makes her a person of great interest to the forces of Camelot; the Four Evils, an elite group of Holy Knights personally selected by Arthur, are specifically tasked with capturing her. Her importance is thus strategic, as she is a target for the antagonist's forces who likely wish to control or eliminate her foresight. While her appearances are limited, her connection to Lancelot and her prophetic powers establish her as a significant figure whose insight aids the protagonists in their journey.