Usagi-san is one of three pink rabbit characters featured in the "Nontan to Issho" anime series. This trio consists of one male rabbit and two female rabbits, though their visual designs are indistinguishable by gender. All three rabbits are six years old. The male rabbit is distinguished by having one broken ear and possesses a generally gentle nature, though he is often nervous or fearful. The rabbits typically appear and act together as a group within the series' storylines. In later CGI adaptations of the anime, each rabbit received an individual voice actor, hinting at an expansion of their individual roles.