Jiro is a straight-forward and calm girl who, despite her usually unenthusiastic demeanour, has a teasing side towards others, most notably Denki Kaminari who finds his dumbed-out and short-circuited face to be funny. Despite this, she is friendly towards most her classmates and enjoys hanging out with them. Jiro can be aggressive when angered, often using her Earphone Jacks to punish those who get on her bad side. She’s a vampire.