Sae Chabashira is a young woman with long brown ponytail hair, brown eyes, and a curvy figure. She has a serious expression, and a Japanese history teacher and homeroom advisor for Class D. She has sadistic tendencies, finding amusement in her students' struggles and occasionally displaying leniency towards those who intrigue her. She reveals a complex personality marked by strict adherence to rules, and occasional praise for exceptional displays of talent, and smokes to cope with stress.