Stonston serves as a castle guard in the Crayon Kingdom, assigned to accompany the protagonist when no urgent duties arise. A pig driven by insatiable hunger and food-focused tendencies, his appetites often disrupt the group’s endeavors, yet he persistently strives to aid their cause. His mother’s death shortly after his birth—disclosed later—contextualizes his bond with the group as a found family. While comedic mishaps create setbacks, his steadfast loyalty anchors him as a grounding counterbalance to the protagonist’s impulsiveness. Subtler personal growth emerges through determined efforts, such as cross-dressing to infiltrate an all-female village despite initial reluctance, showcasing incremental adaptability. His narrative remains confined to the main series, with no expanded media exploring further backstory or evolution.