The Little Mikos are in training to become mikos. This involves a lot of chores, lessons, and excersises at the temple. Grown-ups and others at the temple are always busy with 'important grown-up things'. This lets the mikos explore and discover a lot of things on their own, and leaves them with plenty of time to have adventures and get into trouble.

Every miko has a bond with a Spirit that gives her a supernatural power, as well as allows the spirit to manifest. Spirits manifest on their own initiative, and often do so to protect or guide the little miko.

The spirits are a sort of imaginary friend, but with actual influence on the world—just like with imaginary friends, grown-ups don't believe they are really there.