Original character by m.m.
She has blonde hair with a touch of orange, which she keeps in a long ponytail save for medium length sidelocks and a pair of "hairtennae". Her eyes are multicolored. Her usual outfit consists of a dark blue track jacket with orange trim and an exceptionally flattering pair of bike shorts.
Born into a family of rice planters, she has an older brother named Koshirae Kenji and a grandmother named Koshirae Chitose. She also has a pet penguin named Hijikata-san. She carries a short sword, with which she is proficient.