"I"'s neighbor. 22 years-old. A freeter, and also a master of kendo and kenjutsu. Always keeps her hair in a ponytail, usually wears a jinbei, with kanji representing her emotions at the moment, over casual clothing at home. Miiko hardly expresses her feeling through facial expression, but surprisingly, she has a rough temper when fighting. Once an information is received by her, it will be hard to make any changes to it afterwards. Likes sweet things, sake, and collecting antiques. Owns a Fiat 500, which is often borrowed by "I". Can never stop getting into trouble with the guests at a new work place, but still finds a job teaching at a kendo school momentarily.