Miren Sakurano is a 165-centimeter-tall high school student with physical measurements of 90-61-89. Her hair is long and depicted as either blonde or brown across different sources, while her eyes are identified as green in one instance and amber in another. She presides over the extraordinary Love Club, which studies romantic relationships covertly in the school church basement despite a disciplinary committee ban.

As club president, Miren orchestrates activities and devises practical training methodologies, designing exercises focused on dating simulations, expressions of affection, and physical intimacy; she approaches them as structured learning experiences. Demonstrating leadership, she conceptualized "Project Kensuke," an initiative aimed at helping fellow member Kensuke overcome romantic hesitations through guided practical experiences. Her personality is balanced and deliberate, often acting as the voice of reason. She speaks thoughtfully and strategically plans most club endeavors.

Miren interacts closely with members like Minami and Madoka, coordinating their involvement in club projects. She also facilitates the integration of new members such as Kensuke into the club's activities and training regimen. Her approach includes mediating between members' romantic interests, including situations where affections are directed outside the club.