Asaoka fulfills the role of school doctor in her educational setting, presenting as an attractive adult woman with black hair and violet eyes. Her professional attire combines a medical coat with revealing clothing—specifically short miniskirts and sexually provocative lingerie. While projecting an outwardly disciplined, meticulous demeanor and demanding similar professionalism from others, she harbors a pronounced libido. Her sexual inclinations favor observational and dominant positions during student intimacy. She enforces a supervisory policy over infirmary sexual activities, insisting they occur only under her medical oversight, and sometimes engages directly. When students show reluctance or discomfort toward sexual participation in her presence, she administers "Tomishige's special drink" to reduce inhibitions and ensure cooperation.