Manager Muranishi is the chairman of the entertainment agency that manages Kirari Tsukishima and the idol group Ships. He is a producer and a key figure in the series. Muranishi has auburn hair and yellow eyes, and his birth date is September 26, making him a Libra with blood type B. He recognizes Kirari’s potential from the beginning and orchestrates many arrangements to support her career before and after she becomes an idol. His personality blends the kindness of Seiji with the eccentricity of Kirari, often displaying emotional reactions such as crying or fidgeting, which can make him seem less authoritative than his position suggests. Despite this, he is deeply dedicated to his artists and strives to keep them from worrying. It is revealed in episode 128 that he used to be a member of a band, a background that informs his understanding of the music industry and his role as a producer. Muranishi acts as a mentor to Kirari, guiding her development as a performer and helping her navigate the challenges of the entertainment world. His key relationships include his close working ties with Kirari, Hiroto, Seiji, and other talents under his agency, such as Erina Ogura and Mochio Mochida. Over the course of the story, his past as a musician and his growth as a supportive manager become clearer, adding depth to his character. His notable abilities include music production, talent management, and a keen eye for potential in young performers.