Riku Nanase is a vibrant and passionate character from the anime series 'Idolish7'. He is a member of the titular idol group, IDOLiSH7, and serves as one of its lead vocalists. Known for his cheerful demeanor and determination, Riku is deeply committed to his music career despite suffering from a chronic illness that affects his stamina. His twin brother, Tenn Kujo, is part of a rival idol group, adding a personal layer to his professional challenges. Riku's warm personality and dedication make him a beloved character in the series.