Live action TV
Description
Daigo Kagemitsu is a central figure in the story as the biological father of the protagonist, Hyakkimaru, and the lord of a domain in a war-torn version of feudal Japan. His defining act is a pact he makes with a group of demons, an agreement that sets the entire narrative in motion. Facing a period of devastating famine, disease, and societal collapse in his lands, Daigo, driven by a potent mix of desperation for his people and a profound personal ambition for power and legacy, turns to the supernatural when prayers to the gods fail. He approaches the demons at a place known as the Hall of Hell and bargains for the prosperity and security of his domain, famously offering anything that belongs to him except for the land itself. The demons accept his offer, and the price they claim is his then-unborn first son.

When the child is born, the consequences of Daigo's deal become horrifyingly clear. The infant, named Hyakkimaru, enters the world missing numerous body parts, including limbs, organs, and sensory organs, which the demons have taken as their payment. Daigo, marked by an X-shaped scar on his forehead as a sign of his contract with the demons, shows little hesitation. He orders the baby to be abandoned, immediately setting his sights on producing a proper heir, and instructs his wife to forget the child and bear him another son. True to the bargain, his land begins to flourish, and his domain grows prosperous and powerful, seemingly validating his horrific sacrifice as a pragmatic, albeit brutal, act of leadership.

In terms of personality, Daigo Kagemitsu is primarily defined by his unwavering and ruthless ambition. He is a calculating and pragmatic leader who views everything and everyone, including his own family, as tools to be used for the sake of his political goals and the prosperity of his land. While he often frames his cruel decisions as necessary sacrifices for the greater good of his people, his actions are consistently rooted in a deep-seated desire for power, fame, and the establishment of a lasting legacy. He can be cold, stern, and dismissive, particularly towards his wife, whose lingering guilt and grief over their abandoned son he sees as a weakness and an annoyance. He is also manipulative, as seen in how he manages the information his younger son receives about his older brother, and he shows little to no remorse for the suffering he causes. Despite this, some versions of the story, particularly the 2019 anime, suggest that his original wish was partially born of desperation to save his people from ruin, adding a layer of tragic complexity to his villainy.

Within the story, Daigo serves as the overarching human antagonist and the primary source of Hyakkimaru's suffering. His role is to embody the corrupting nature of unchecked ambition and to represent the moral decay that can fester within a society built on a foundation of sacrifice. His key relationships are fraught with tension and tragedy. With Hyakkimaru, his relationship is one of an estranged and hunted son; Daigo initially wants to eliminate Hyakkimaru when he learns the boy is alive and reclaiming his body parts, as this act threatens the demonic contract that underpins his domain's prosperity. With his younger son, Tahomaru, Daigo is stern and distant, raising him as the legitimate heir and successor while keeping the dark secret of Hyakkimaru's fate from him, eventually pitting the two brothers against each other. His wife, Nui No Kata, is a tragic figure caught between her husband's ambitions and her own maternal love, a conscience that Daigo consistently ignores and suppresses.

Daigo's development throughout the narrative is a slow, painful descent towards the consequences of his choices. He spends the story trying to preserve the ill-gotten gains of his deal with the demons, fighting against the return of his abandoned son who represents the unraveling of his pact. He watches as his family is torn apart, his younger son is grievously wounded, and his wife takes her own life, yet he remains largely committed to his path, often responding with cold fury or a renewed determination to kill Hyakkimaru. The climax of his character arc typically arrives at the point of total ruin: his domain is devastated, his family is gone, and his ambitions lie in ashes. In the final confrontation with Hyakkimaru, often in the ruined Hall of Hell, Daigo is forced to confront the emptiness of his choices. While he initially clings to his justifications and rages against his son, the destruction of everything he built eventually breaks his resolve. He is left weeping over the lost opportunity to have raised Hyakkimaru as his successor, recognizing the human bond he sacrificed for power, but his repentance often comes too late to salvage anything.

In terms of abilities, Daigo Kagemitsu possesses no supernatural powers of his own; his strength is not in personal combat but in his position and his mind. He is a skilled and strategic leader of men, a cunning politician, and a capable military commander. His true power lies in his authority as a lord and his willingness to make ruthless, calculated decisions. The prosperity and military might of his domain are not the result of his own superhuman feats but are the direct, cursed fruits of the demonic pact he made at the story's beginning.
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