King Distinia is the sovereign ruler of the Destinia Kingdom, a nation that serves as a central location in the story. As a leader, he carries the weight of his kingdom's fate on his shoulders and is a figure shaped by the hardships of war. His background is defined by the events following a great conflict, during which he became deeply concerned about the power wielded by the hero Setsu Suzaki. Viewing this immense strength as a potential threat to his kingdom and his own position, he made the drastic decision to force Setsu into a reincarnation, sending him back to Earth as a baby. Interestingly, the sequence of events changes between different versions of the story. In the original source material, King Distinia is directly responsible for this act. However, in the television anime adaptation, he is not the direct cause of Setsu's reincarnation; instead, he becomes a victim of the intrigues of another character named Tōma, who manipulates him into moving against the nation of Evilchion.

In terms of personality, King Distinia is a cautious and perpetually vigilant leader, forged by the trials of past wars. He is capable of making cold, difficult decisions when he believes they are necessary for the safety of his country, demonstrating both political shrewdness and a certain emotional vulnerability in specific moments. His actions are often driven by a strong sense of responsibility to protect his people and his realm, but this can cross over into excessive wariness. His choices are frequently influenced by a fear of losing power and seeing his kingdom destabilized by unpredictable elements. This paranoia can lead him to take ruthless actions that may be perceived as cruel, highlighting the complex nature of his rule.

King Distinia's primary motivation is to secure his kingdom and his own authority. After the end of the initial war, he perceived the hero Setsu Suzaki as an uncontrollable and dangerous variable that had to be eliminated, even through extreme methods like forced reincarnation. Later, when a second summoning occurs and new heroes arrive, he sees an opportunity to once again gather forces for a potential new conflict. His role in the overarching story is that of a key political figure whose decisions have massive consequences for the balance between nations like Destinia and Evilchion. He represents the dilemma of a ruler forced to choose between the ideal of the collective good and his own personal fears. In the anime, his role shifts to become less of a direct antagonist and more of a tragic figure, a pawn manipulated by Tōma, ultimately leading him to start a war against his will and becoming a victim himself.

His key relationships are defined by this dynamic of fear and manipulation. His connection to Setsu Suzaki is one of direct opposition, viewing the hero's power as a threat to be neutralized. In the anime, his relationship with Tōma is central, as he is caught in the villain's machinations and becomes an unwitting pawn, used to create conflict without his full understanding. Regarding character development, King Distinia's journey differs between the source material and the anime. In the original, he acts as a formidable authority figure who makes a preemptive strike against a perceived threat. In the anime, his development is more that of a victim, highlighting how fear and the desire for control can make even a powerful king vulnerable to manipulation, turning a potential antagonist into a tragic figure forced into conflict. There is no available information regarding any notable abilities or special powers possessed by King Distinia.