The Karakasa-Obake are a race with the form of a large umbrella that were once tools used by humans, they became monsters after gaining life and sentience from absorbing enough demonic energy over time. The Karakasa-Obake are also referred to as "tsukumogami"; a type of monster that used to be tools but gained a life of their own. They have a strong desire to be "used" by the human male's who own them regardless of how they were treated, Those who were handled with care or were used crudely and thrown away have an equal chance of becoming "tsukumogami" and seek to be with their owner.