Kira Yamaguchi, born in 2004 in Nagasaki, is making waves in the world of film and physical media as a talented actress, singer, and dancer. Her breakout role came in Takashi Miike's 2020 film "Secret × Heroine Phantomirage! ~We've Become a Movie~," where she not only showcased her acting chops but also contributed to the idol group mirage² formed through the series. This film has become a sought-after title among collectors, particularly for its unique blend of action and idol culture, appealing to fans of both genres. Collectors are drawn to Yamaguchi's work not only for her charismatic performances but also for the film's limited releases on Blu-ray and DVD, which often include collectible features and behind-the-scenes content. As she continues her journey with the girl group Girls² and their various projects, Yamaguchi's early works, especially "Phantomirage," are expected to rise in value, making her a notable figure in the realm of physical media collecting.