Reo Kourogi

A girl characterized by her hairstyle set in twin tails with large chignons and goggles. She speaks with "〜です" at the end of her sentences. She is a classmate of Soga.

She also conducts research on different spirits as part of her experiments with exorcism tools, and when she finds something interesting related to spirits, she habitually exclaims loudly, "Excitingー!!" Although her abilities as an exorcist are inferior to those of Matsuri and others, she compensates for this with a variety of exorcism tools and tactful strategies. She favors Matsuri, who appreciated the quality of the first wind demon shuriken she ever made and acknowledged her skills as a craftsman, and she dedicates herself fully to supporting him as his assigned craftsman. However, Suzu becomes wary of her because of her aggressive approach towards Matsuri and the trust he places in her as a craftsman, labeling her as a "person of interest." She is also extremely fond of using incense in her exorcisms and is an extreme scent fetishist, recognized as a pervert by herself and others.

Initially, she attended the all-girls Saint ZodiAnne Academy because it was close to her home, but she transferred to Kitasai High School, where her grandmother serves as the principal, to support Matsuri, becoming classmates with Soga.

As their fathers were good friends, she and Soga have known each other since childhood, but because she used him as a test subject for her inventions from a young age, he harbors a strong aversion towards her.