Kasumi Kawamura

Eldritch Academy: Yue’s classmate. Kasumi prefers spending time with her friends to studying, and she has a reputation for being an airhead. She spends a lot of time with Yue, to the latter's annoyance.

Eldritch University: The protagonist and main viewpoint character. Kasumi spent much of high school being regarded as an airhead, which has led her to try to act more mature... with limited results. She tends to be friendly and outgoing, making friends easily.