The Mumiai are kind of like little mischievous faerie justice-deliverers. They monitor people's behavior and punish them for wrongdoings by breaking their dishes and stomping on any plants they have growing in their gardens. They are especially active in the lowest classes and castes, and seek to punish rather than to attempt to right the wrongs. (For instance, if someone stole from another, they'd simply get their houses trashed, but not be taught a lesson about stealing.) The Mumiai usually continue their behavior sporadically until they run the offending people out of town, at which point they are satisfied and do not follow.