Minoru Ohkuma, a reserved student in Roubai Academy’s Class 1-3, maintains a quiet presence while quietly observing her surroundings. She sidesteps direct social interaction, choosing instead to document human interactions and wildlife in detailed notebooks. Her mornings begin with solitary wildlife observation, a practice underscoring her connection to nature and active role in the Biology Club. Her routine takes a pivotal turn when she rescues a blue rat snake, sparking an unexpected bond with Komichi Akebi, who shares her passion for animals.

Academically, she balances curiosity with mechanical aptitude, demonstrated through her knack for machinery and repairs. School events push her beyond her comfort zone: she joins Komichi, Ai Tatsumori, and Riri Minakami in a swimming relay and faces Ayumi Togeguchi in table tennis matches. These experiences slowly draw her into class camaraderie, softening her initial preference for solitude.

Dormitory life pairs her with Ayumi, reflecting their mutual routines. Her appearance—sporting naturally curly short hair—hints at a cheerful yet unassuming demeanor. Though her family and pre-academy history remain unspecified, her growth focuses on relationships deepening through collaborative activities, demonstrating a transition from quiet observation to engaged involvement in group pursuits.