Shindou Nanami

Haruyoshi's homeroom teacher. She doesn't show any emotions in either her actions or speech. She always seems to appear where strange things happen and is constantly observing Haruyoshi and others around him including Kaede. She doesn't like to eat normal food (instead she prefers nutrient pills). She has a complex about looking like a little girl and that no one takes her seriously.

Spoiler

She has a secret crush on Haruyoshi.