Umeko Tsuzuri is a Master at Butei High School and Head of the Dagula Department, specializing in interrogation. Ranked among Japan's top five interrogators, her effectiveness is such that even the most resistant offenders reportedly begin calling her "Queen" or "Goddess" after her sessions.

She possesses fair skin, short black hair, and purple or black-grey eyes, often accompanied by an unfocused gaze that can seem drug-induced, potentially linked to her constant smoking; she is almost always depicted with a cigarette. Her typical attire includes a white tank top revealing cleavage and stomach, military green pants, a black coat, black gloves, and black boots.

Her unfocused stare unnerves students. Demonstrating limited concern for academic performance like other Butei teachers, she can recall detailed student statistics yet frequently struggles to remember simple words mid-conversation. She reacts negatively to negative comments made behind her back. Her demeanor is generally perceived as laid-back and cool, reinforced by her ever-present black leather jacket and smoking habit.

She carries a Glock 18C as her personal weapon, reflecting the school's armed environment. Notably, some male students deliberately seek punishment from her or Ranbyou, implying a degree of infatuation or admiration.