Ashibe Ashiya anchors the narrative as a six-year-old elementary student whose world revolves around home and school. His defining bond is with Goma-chan, a spotted seal pup companion present throughout his experiences. Radiating cheerfulness and optimism, Ashibe often expresses joy through energetic gestures—particularly flashing peace signs while exclaiming "Peace!" during greetings or happy moments, a trait more vivid in animated portrayals. He employs a unique conflict-resolution technique called the "Brotherly Love Hold," taught by his former-town friend Sugao, which subdues opponents by fostering positive feelings instead of causing harm.

His social sphere includes peers like Yuma and Mao, alongside family: Pa (father), Ma (mother), and his bespectacled grandfather, a company president. Interactions with others, such as Sakata and Sakata’s older brother, sometimes spark envy over Goma-chan, yet tensions dissolve non-confrontationally, often through Ashibe’s Brotherly Love Hold.

The character evolves across distinct life stages beyond the original story, progressing through second-grade and third-grade depictions. Most notably, a later narrative thread shows him as a high school freshman, marking significant chronological growth while preserving his childhood essence. This longitudinal journey underscores his enduring appeal.

Central to Ashibe’s identity are his innocent perspective and consistent kindness toward peers, family, neighbors, and animals. His episodic adventures with Goma-chan and their unique community emphasize positive values and lighthearted everyday engagement. Spanning decades of storytelling with 20 million print copies sold, his journey reflects profound cultural resonance.