Ky

Ky, literally "princess", refers to the "key" for the "Lid of the Kettle of Hell". The Ky controls the opening of the "Lid", and can be used, for instance, to seal collected jaki in Hell (AZ), away from this world.

The Ky is a person, who can be either female or male (despite the kanji's literal reading of "princess"). When the current Ky dies, somebody living in the town where the "Lid" is located automatically becomes the new Ky. The new Ky will just learn of his/her new status and responsibilities without being told by anybody else.

It seems that people who practice or have knowledge of magic, sorcery, or other mystic/arcane arts, are more likely to become Ky.

For a list of Kys, see Category:Kys (spoiler!)