Nora, an older and experienced stray dog encountered by Bun Bun during the journey, forms part of the core group alongside Bun Bun and Bunta. She provides guidance and protection to the young protagonist, embodying pragmatic survival instincts shaped by street life. Her demeanor reflects world-weariness and caution born from hostile human encounters.

As a mentor, Nora shares survival strategies for navigating urban dangers, including avoiding threats like dogcatchers and finding refuge in expansive underground sewer systems. Her interactions emphasize the harsh realities of stray life, contrasting Bun Bun's initial naivete with hardened experience.

When pursued by a cruel dog breeder intent on forcing Bun Bun into becoming a fighting dog, Nora actively works to thwart these efforts. She demonstrates protective instincts during confrontations, shielding Bun Bun from exploitation and physical harm. This antagonistic relationship underscores her role as a defender against human cruelty toward animals.

Nora's worldview reflects themes of resilience and distrust toward humans, shaped by witnessing exploitation and abandonment. Her experiences contribute to Bun Bun's gradual understanding of independence and survival complexities. Narrative arcs involve collaborative efforts to evade capture, confront threats like organized dog fights, and sustain the group through shared resources.

In the theatrical adaptation, Nora's characterization focuses more on philosophical exchanges about life experiences during sewer stays, diverging from the television series' maternal search. This version presents her as a contemplative figure offering wisdom in quieter moments, while still participating in critical events like evading authorities or brief skirmishes. Her presence consistently reinforces the dynamic of older strays imparting knowledge to younger ones amid adversity.