Eiko Kawasegawa

Eiko is a quite competitve, stubborn and mature young woman whose enthusiasm and talent for film-making have no bounds. She is also somewhat prickly and looks up to her older sister and professor Misaki Kanou. In short, she is somewhat of a Type-A Tsundere. At the same time, she is able to empathize with others and holds herself to the same high standards she expects of her colleagues.

(Source: Bokutachi no Remake Wiki)