Kasa-obake are a mythical ghost or yōkai in Japanese folklore. They are sometimes considered a tsukumogami that old umbrellas turn into. They are also called "karakasa-obake", "kasa-bake", and "karakasa kozō".
Stolas is a Great Prince of Hell, commands twenty-six legions of demons, and teaches astronomy and the knowledge of poisonous plants, herbs and precious stones. From Collin de Plancy's, "Dictionnaire Infernal"