Noshishi is one of the twin boar apprentices journeying with the fox Zorori. He and his counterpart Ishishi are permanent companions on every adventure, inseparable partners in Zorori's schemes and escapades. Their naive and childish behavior consistently defines them as a comedic duo.

During the dinosaur egg adventure, Noshishi, Ishishi, and Zorori accept an invitation from a dinosaur mother to witness eggs hatching. After a typhoon scatters the eggs, Noshishi joins the quest to find and return them safely. This mission highlights their typical role supporting Zorori's objectives.

Across all official media—films, series, and books—Noshishi and Ishishi are uniformly depicted as an inseparable unit. They share identical traits of loyalty and simplicity, contributing collectively to the group's dynamics through comedic mishaps. No significant individual differentiation exists in their background, development, or narrative functions; their characters remain consistent without notable evolution or standalone backstory outside their partnership.