TV-Series
Description
Floki is a central antagonist in Vinland Saga and holds the rank of commander within the Jomsvikings, an elite and powerful order of mercenary Vikings. His position places him among the principal military leaders serving under King Sweyn of Denmark during his invasion of England, and he continues to serve under King Sweyn's successor, Canute. Floki's most significant act, which sets the entire story in motion, is contracting the mercenary leader Askeladd to assassinate his former comrade, Thors. This event, driven by Floki's ambition and personal grudges, brings immense tragedy to the protagonist, Thorfinn, and shapes the course of the narrative.

In terms of appearance, Floki is depicted with fair hair that is kept trimmed to a medium length, a style that contrasts with many other Vikings. His beard is likewise trimmed into a distinct rectangular shape, which gives his face a square, stern appearance. A large scar runs down the right side of his face, extending to his lip, and he notably lacks eyebrows. Early on, he is sometimes shown wearing a helmet, but he is more frequently depicted without one, dressed in the standard attire of his Jomsviking crew.

Floki's personality is defined by ambition, cold calculation, and a deep-seated pettiness. He is an extremely shrewd and cunning individual who is willing to do almost anything to achieve his goals. His primary driving motivation is his ambition for power, specifically to see his grandson, Baldur, installed as the chieftain of the Jomsvikings, even though Baldur himself has no interest in the position. Floki is also exceptionally spiteful. He harbored a long-standing grudge against his fellow Jomsviking, Thors, feeling that Thors always looked down on him. This resentment contributed heavily to his decision to have Thors killed, using Thors's desertion from the Jomsvikings fifteen years prior as a convenient pretext. Despite his ruthlessness, his genuine care for his grandson Baldur is presented as his only redeeming quality.

Floki's role in the story is that of a key antagonist and political operative. He is frequently employed by his superiors, including the Jomsviking chief Sigvaldi and King Sweyn, to carry out sensitive and delicate tasks. These missions include tracking down Thors in Iceland to force his return to the Jomsvikings and attempting to persuade the powerful warrior Thorkell to switch his allegiance back to the Danish crown. These assignments demonstrate that Floki possesses a degree of diplomatic skill, even if his methods are often ruthless. Later, during the Danish succession crisis, he schemes to support King Sweyn's elder son, Harold, and plots against Prince Canute, putting him in direct conflict with Askeladd, who has sworn loyalty to the prince. When King Sweyn is assassinated, Floki tries to seize leadership of the Danish army but is outmaneuvered by Canute, who quickly takes command. After Canute ascends the throne, Floki continues to serve as a senior vassal, though his primary loyalty remains with the Jomsvikings, maintaining an alliance of convenience with the new king.

Key relationships define Floki's actions and his place in the world. His relationship with Thors is one of former comradeship turned poisonous with jealousy and resentment. His decision to have Thors murdered is the cornerstone of his villainy and the source of the central conflict for Thorfinn. His relationship with the Jomsviking commander Thorkell is another connection from their shared past. Floki attempts to use Thorkell for his own ends, but the volatile and powerful warrior is not easily controlled. As a subordinate and later ally to King Sweyn and King Canute, Floki is a valuable but treacherous asset, always maneuvering for his own advantage and that of his family. His most significant personal relationship is with his grandson, Baldur, for whose future he is willing to sacrifice everything and anyone.

Throughout the series, Floki's character undergoes significant development, particularly in his quest for power. His schemes to secure the Jomsviking chieftaincy for Baldur eventually lead to a major confrontation during the Baltic Sea War. He perceives Thorfinn, the son of the man he had murdered, as the greatest threat to his grandson's inheritance, despite Thorfinn's stated lack of interest in the position. In his paranoia, Floki hires the deadly assassin Garm to eliminate Thorfinn. This plan backfires spectacularly when Garm, acting on his own, kills the ally Vagn, which enrages Thorkell and leads to an all-out assault on Floki's fortress of Jomsborg. In the ensuing chaos, Floki attempts to abandon his fortress and men but is captured. Ultimately, Thorfinn, who has renounced revenge, spares Floki's life but exiles him, stripping him of all authority. Having lost everything he fought for, Floki becomes a broken and aged man, forced to leave with his grandson Baldur and a handful of retainers on a journey to an uncertain fate.

Regarding notable abilities, Floki is not primarily known as a front-line warrior, though as a commander of the Jomsvikings, his combat skills are presumed to be formidable. He is briefly shown crossing swords with Askeladd, which demonstrates he is capable of defending himself. Floki's true strength lies in his intelligence, political cunning, and diplomatic skill. His consistent employment on delicate missions by powerful leaders like Sigvaldi and King Sweyn indicates that he is valued for his ability to negotiate, manipulate, and handle complex political situations where brute force alone is insufficient. This combination of ambition, political acumen, and a willingness to use treachery makes him a dangerous and effective antagonist.