Known as "Absolute Cold Tachibana" for her cold and expressionless attitude towards the students, Chizuru Tachibana is the Kawanuma East school's nurse. She has light grey hair. Initially wanting to relate better with students in general, she takes a liking to Ko Tanaka that she has no issue with changing her clothes in front of him. She eventually accepts his confession at the end of the volume and they lose their virginity to each other in a love hotel in the bonus chapter 40.1.