Minako Tominaga attends Okitsu High School as a student in Class 2-A. She maintains a brutally honest personality, frequently expressing frustration about being surrounded by "idiots" in her class and openly criticizing others' behavior. Despite her sharp tongue, she remains paradoxically one of the school's most popular students.

She belongs to the cooking club, where her homeroom teacher recognizes her culinary skills, aligning with her status as one of the class's more feminine members. Her interests include a strong affinity for slasher films, which she often discusses while casually wielding absurdly sharp blades.

Within the eccentric dynamics of Class 2-A, she serves as the "only sane woman" alongside Gen "Old Man" Nakamura, providing a grounded perspective amid the chaos. Her family resides in a sprawling home, as shown during a Christmas party hosted there.