Director Minami serves as director of Otonokizaka High School and is mother to Kotori Minami, a founding member of school idol group μ's. She initially announces the school's impending closure due to declining enrollment and financial necessities. Her responsibilities encompass overseeing student activities and managing operational challenges. When student council president Eli Ayase seeks restrictions on μ's after their failed recruitment attempt, Director Minami refuses, asserting institutional circumstances should not limit student initiatives. She later demonstrates μ's growing impact by showing Eli their online view counts. She permits μ's entry into the Love Live! tournament contingent on academic performance, a condition the group meets.

Her dynamic with Kotori balances maternal concern with respect for autonomy. She supports Kotori's μ's involvement despite the school's difficulties and questions her daughter about confidence in an unspecified pivotal decision. She authorizes μ's school sleepover before the Love Live! finals, accompanies Kotori to the airport, and attends μ's performances. Background notes identify her as a childhood friend of Honoka Kosaka's mother, with both families residing on the same street. Physically, she has gray (or brown) hair, yellow eyes, and stands 1.62 meters tall. During the anime's finale, she exchanges a knowing smile with Maki Nishikino's mother at a μ's concert, hinting at their acquaintance. Following μ's success and improved enrollment prospects, she declares Otonokizaka will remain open.