Okorizaru is a Fighting-type Pokémon defined by its seething fury and volatile temperament. It belongs to a perpetually optimistic young trainer who documents their interactions. Despite the trainer's persistent efforts to calm it through peaceful activities like offering Berries, attending concerts, visiting meadows, or skiing, Okorizaru remains consumed by rage. Its aggression manifests in confrontational outbursts and explosive reactions when thwarted.

Yet, beneath this volatility lies fierce loyalty to its trainer and a strong inherent sense of justice. A pivotal moment occurs when the trainer discovers Okorizaru finds true fulfillment not in relaxation, but through battle. Engaging in combat channels its rage productively, unleashing exceptional battling prowess and strategic adaptability.

This shared focus on intense combat deepens their bond and leads to significant achievements, including championship victories. Through these battles and mutual dedication, Okorizaru evolves into Konoyozaru (Annihilape). This evolution signifies a maturation from uncontrolled fury to a more focused expression of power, while its core spirited and assertive nature endures.