Chie Setouchi (瀬戸内 智恵 Setouchi Chie?) is a third-year high school student of Osafune Girls' Academy. Her okatana is Sohayanotsurugi.

She is Mihono Asakura's childhood friend and the two both originated from Gifu prefecture. However, Chie moved to Okayama prefecture before her middle school years, and has been studying in Osafune Girls' Academy since then.

Chie is a girl who calmly assesses things from a distance. However, in contrast to Mihono, she is an older sister figure who likes to cook dishes for others.