Eiko Kawasegawa (河瀬川 英子, Kawasegawa Eiko) is one of the main characters of the series. She is a student at Ōnaka University of Arts whom Kyōya Hashiba meets at the present time as the leader of a game project planner.
Eiko is a young woman with butt-length maroon hair that is half tied in a small ponytail where it is braided in the back with bangs swept to the left side while the tips of her hair are styled in small tight ringlets and gold, green-tinged eyes.
As a college student in the second timeline of Bokutachi no Remake, she wears a light beige long-sleeved shirt, a long lime-green skirt and wooden sandals.
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.
A second-year student in Kyōya Hashiba's Department of Film who later joins Kyōya's team Kitayama. In the previous timeline, in 2018, she became Kyōya's colleague and a leader in planning and development. In the anime, she was his boss until their team was laid off.
- The name Eiko means "excellent, fine" (英) (ei) and "child" (子) (ko).
- Eiko's surname Kawasegawa means "river, stream" (河) (kawa), "swift current, rapids" (瀬) (se) and "river, stream" (川) (kawa/gawa).