Tsumugu Yourou

The janitor of Chouji's school. She always wears her maid outfit, and often carries around her customized broom (as in customized to be a real lethal gun weapon) with her. She was known to always wear her poker face and never let out a single emotion before, <hidden by spoiler settings>. Now, she's staying in a dog house in Chouji's garden rather than living at school where she used to live before.