Naridon is a central figure in Oni: Thunder God's Tale, introduced as the father of the protagonist Onari. He is a large, gentle creature who is a man of few words, expressing himself more through actions and physical presence than through speech. His entire world revolves around his daughter, and his primary role in the story is that of a devoted single parent who protects, encourages, and raises Onari within the mystical community of Mount Kamigami. He takes on the responsibilities of daily care, from cooking to keeping house, and engages in playful, joyful activities with her, embodying a goofy and affectionate nature that contrasts with his immense inherent power.

Naridon is drawn in the image of Raijin, the Japanese god of thunder and lightning, and he possesses a brother named Putaro who is modeled after Fujin, the god of wind. Separated from their parents early in childhood, the brothers originally acted as storm gods, with Naridon beating his drum to create thunder while Putaro generated strong winds. A pivotal event in Naridon's past changed the course of his life: a killer storm caused the death of Onari's human parents, and the infant Onari was handed to Naridon for safekeeping. This tragedy transformed him. He became deeply aware of the immense destructive capacity of his power and made a conscious choice to suppress his thunder-god nature in favor of nurturing and protecting his adopted daughter. From that point forward, he dedicated himself entirely to raising Onari, living a simple, rustic life and aiding the natural world of the forest rather than exercising his divine abilities. His motivation is driven by unconditional love and a profound sense of responsibility, and he works to shield Onari from the truth of her own origins and his true identity as a powerful storm deity.

Within the story, Naridon serves as a stabilizing and loving presence in Onari's life, especially as she struggles to discover her own unique powers and face the threat of the Oni. His role is that of a protector, but also one of restraint, as he keeps his past and his full power hidden out of fear and a desire to protect Onari from the harsh realities of their situation. When his brother Putaro arrives at Mount Kamigami, Putaro attempts to draw out the intimidating thunder god in Naridon, but Naridon clings to his identity as a parent. A key relationship is with his brother Putaro, who represents the storm god identity Naridon has abandoned. The most crucial relationship is with Onari; he is her sole parent and confidant, and their bond is the emotional core of his character. As Onari grows and faces danger, Naridon's protective instincts are pushed to their limits.

Naridon undergoes significant development when his secret is finally revealed. When a mob from the village comes to hunt Onari, believing her to be an Oni, Naridon succumbs to fear. This fear causes him to be engulfed by dark shadows and transform into a huge, monstrous version of himself, unleashing the thunder god power he had long suppressed. This transformation is a critical moment, representing the culmination of his repressed nature and his overwhelming drive to protect his daughter at any cost. He does not easily give up his role as a single parent; his identity as Onari's father remains the single most important aspect of his being, and he defends that role against all odds. His journey is one of great repentance for the past and a struggle to reconcile his gentle, caring nature with the terrifying power he holds. In terms of notable abilities, Naridon possesses the inherent powers of a thunder god, including the ability to conjure storms, create lightning and thunder, and physically transform into a towering, monstrous entity of immense strength when his emotions are pushed to their breaking point. However, for the majority of the story, he deliberately withholds this power, choosing instead to live peacefully as a quiet, loving father.