Mia Taylor, a third-year Nijigasaki High School student, transferred from New York at her friend Lanzhu Zhong's invitation. Born into a globally renowned musical family on December 6, she is a 156 cm tall Sagittarius with AB blood type and measurements of B80・W55・H80. Despite her lineage, she embraces a homebody lifestyle and passionately adores hamburgers. Her platinum silver boycut hair, grey eyes, and signature silver rectangular left-ear earring match her platinum silver image color. A music prodigy who attended U.S. college at age 14 due to exceptional talent, Mia initially served as songwriter for Lanzhu's group, the Association. Her outwardly competitive and blunt demeanor—including abruptly declaring songwriting rivalries—concealed deep insecurities about her compositions. Seeking guidance from Rina, she gradually embraced collaboration and understanding others' perspectives. This evolution reconciled her solitary nature with the school idol club's community spirit, culminating in her Chapter 29 induction as the 12th member and 11th official school idol. Fluent in English and Japanese, Mia frequently code-switches and composes songs reflecting early 2000s English pop. She struggles with practical skills, exemplified by attempting to wash vegetables in a washing machine. Her older sister, Chloe Taylor, appears in later media, while her on-screen male parents make her the anime's sole character with depicted paternal figures. Franchise distinctions include being the first main character born outside Asia/Europe and the youngest school idol as of 2021. Her journey includes forging club friendships and contributing to the unit R3BIRTH.