Luna-P Ball is a unique and magical companion device in the anime series Bishoujo Senshi Sailor Moon. Often simply called Luna-P, it resembles a cat's head and serves as a multifunctional tool, most notably for Chibiusa (Sailor Chibi Moon). Luna-P can transform, communicate, and provide various gadgets to assist Chibiusa during her adventures. It acts almost like a sentient pet and plays a supportive role, helping Chibiusa adapt to life in the past and aiding the Sailor Guardians.