"I'll get to the bottom of this!"
Friends with Yozan since birth, Koharu is a full two seasons older than the boy and enjoys reminding him of it, much to his chagrin. The Hyuran girl takes pride in her endurance—her nigh-endless stamina most likely attributed to the long hours spent training in the arts of the ninja. Her ability to outpace both Yozan and Shiun—boys she fancies—in footraces is an attestation to this vim and vigor.
F'lhaminn endeavors to teach Koharu dance, but the girl lacks a sense of rhythm, and must endure Yozan's endless japes because of this rare shortcoming. Though braver than most grown men, Koharu's sole fear is ghosts—her inability to strike back at the immaterial being the cause of her unease.