Lisa Imai is the bassist of the band Roselia in the BanG Dream! multimedia project. She is introduced as a second-year student at Haneoka Girls' High School and later attends Yotsuba Women's University, studying in the Faculty of International Studies. Lisa follows gyaru fashion, a style characterized by vibrant, trendy clothing and accessories, but she keeps her passion for amigurumi (small knitted or crocheted stuffed toys) a secret, fearing it does not match her outward image. Her flamboyant looks often lead others to mistakenly assume she is frivolous, but in reality she is a deeply compassionate, faithful, and attentive person. Lisa is naturally lively and cheerful, yet she also acts as the calm mediator in tense situations, taking care of everyone around her. She is highly sociable and maintains a wide circle of friends across different bands, including a close friendship with Aoba Moca from Afterglow, with whom she works part-time. Lisa is childhood friends with Roselia's vocalist Minato Yukina, and their bond is a central pillar of her story; she provides unwavering emotional support for Yukina and the band. Despite being a highly proficient bassist who impressed the other members during her audition, Lisa often feels she is the least skilled member of Roselia and becomes sentimental when her friends reassure her of her value. She excels at baking cookies, which she often shares with others, and has a hidden tender side: she is afraid of scary stories and bugs, and sometimes makes endearing mistakes, such as confusing the word for embroidery with a poetry book. Her development involves learning to accept all aspects of herself, including her love for amigurumi, and growing more confident in expressing her feelings openly. Lisa also serves as a bridge between others, helping the Hikawa sisters Sayo and Hina understand each other better. She removed her artificial nails in order to fully dedicate herself to playing the bass, demonstrating her earnest commitment to her music and her band. Through her compassion, loyalty, and quiet strength, Lisa is the heart of Roselia, grounding the group with her warmth and care.