Shizuka Hiratsuka (平塚 静 Hiratsuka Shizuka) is Hachiman Hikigaya's Modern Japanese and homeroom teacher. She is also a guidance counselor and the adviser for the Service Club.
Shizuka is a tall woman with long black hair that falls over her shoulders and reaches her calves. She has unkempt bangs that cover her purple eyes. She is usually seen wearing a lab coat over her work uniform: a black vest with a dress shirt underneath, black pants, and a tie that she wears loosely.