Kaida-san is the main character of KIGITSU Katsuhisa's series, Kaida-san no Kaidan (Ms. Kaida's Ghost Stories). She likes telling scary stories to the boy sitting next to her, much to his dismay.

She appears in a one-time crossover in Franken Fran Frantic, to commemorate the release of Kaida-san no Kaidan. In this chapter, Kaida transfers to Fran's school and takes an interest in the "scary stories" that Fran has seen during her medical career.

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