Demon King

The Demon King (魔王) is the most powerful life form on the continent, and rules The Monster Realm. They have an almost uncontrolable bloodlust and hate for the Protagonist Race, although it varies depending on how strong the demon king is and on his/her personality. Demon King Gele had the most intense bloodlust due to the events she faced prior to her transformation, while others like Gi or Ssulal barely acted against humanity.

The Demon King has the ability to grant its blood to another creature (human, snail, snake, just about anything), turning it into a Dark Lord (魔人). Dark Lords swear absolute obdience to the Demon King and all its successors. Only 24 Dark Lords can be created. The blood pact makes impossible for any dark lord to disobey a demon king, even it's not the demon king that turned them into a dark lord. The Demon King is the ultimate threat to the protagonist race that leads Dark Lords and monsters. By himself he easily surpasses a 2nd class god and is also the only being without a level cap(with the exception of Rance and family).

Ever since the reign of Demon King Ssulal, they have been granted the invincibility field and a fixed ruling lifespan of 1000 years (after becoming Demon King). Demon Kings choose their successors. Once a successor is named, the power is passed from the old Demon King to the successor. If the 1000 year span is up and a successor is still not named, the Demon King will be given a period of 15 to find someone worthy. After the 15 year span is over, the demon king loses the invincibility field and the blood-control ability over dark lords and will start weakening over a period of 50 years. In the end, Planner himself will kill the demon king and choose the successor himself if the 50 year period also ends.

The calendar system used in the Rance World uses the name of the ruling Demon King to mark the era. The previous Demon Kings, along with the calendar era markings are:
 * Kkulf Kkulf, KuKu
 * Avel, AV
 * Ssulal, SS
 * Nighcisa, NC
 * Gele, GL
 * Gi, GI
 * Little Princess, LP