A girl from later part of Gakkou Gurashi manga. She is extremely competent, in contrast with the hallucinating mental breakdown protagonists, but she also gets screwed over by one of the most unfair RNGs out there, not just bordering "because the plot said so", but fully crossing that line. That said, she was still one of my two favorite characters, along with the dem legs mechanic girl. Since anime never reached that far (why not?), all I have to go by is one colored illustration and her monochrome appearance.
Shiiko: Shiiko, blue hair, long hair, hair between eyes, blue eyes
Extra: red sweater, labcoat, jeans, cigarette, smoking