Neko-kun is the central character of Nemurenu Yoru no Chiisana Ohanashi, a gentle cat who first appeared in Yuko Hara's column for Monthly Kadokawa magazine and later became the protagonist of the 1992 OVA adaptation. With a simple, softly drawn face and a calm demeanor, Neko-kun lives a quiet life on a small island surrounded by animal and celestial friends. His personality is friendly, curious, and slightly naive, approaching each small adventure with wonder rather than fear. He is motivated by simple pleasures: sharing meals, exploring the outdoors, helping others, and enjoying the company of his companions. His role in the story is that of a gentle observer and participant in everyday moments that carry a dreamlike, comforting quality.

Key relationships include Usagi-kun, a rabbit companion; Yāsama Neko, a mischievous bandit cat; Tori-san, a bird who often sleeps in Neko-kun's guitar; Risu-san, a squirrel; Hoshi-kun, a star; and Otsuki-sama, the moon, whom Neko-kun addresses respectfully. These interactions form the core of the narratives, which are episodic and lack a continuous plot. Neko-kun does not undergo significant development or change across the stories; instead, his steady, warm nature provides a constant anchor for the gentle, nostalgic tone of the series. He possesses no supernatural abilities beyond the capacity to speak and engage with human-like objects and concepts, fitting the soft fantasy world of the OVA.