Sena Narumi, a graduate of Sakuraoka High School, began her path in entertainment after being scouted as a reader model during junior high school, leading to a career as an actress. She features in the "Romeo" music video by the idol duo LIP×LIP, performing alongside members Aizō Shibasaki and Yūjirō Someya. Sena shares a familial bond with her younger sister, Mona Narumi, an up-and-coming idol who performs under the stage name "mona." To empower Mona's independent career development, Sena deliberately keeps their sisterly relationship secret, ensuring Mona builds her own identity within the industry without relying on their connection.