Demon Lord

A Demon Lords is a being with great power who are the "greatest terror the Little Garden has ever known." They are of different Species. When a Demon Lord challenges someone to a Gift Game, they cannot refuse the challenge, though it is unknown how and why. Typically, Demon Lords are extremely powerful beings within Miniature Garden, who consider destroying a large community in a single night as child's play. The No Names were one such community that was destroyed by a Demon Lord.

The Demon Lord Shiroyasha is capable of creating gods, though it is unknown if this ability is shared with other demon lords.

The following [Demon Lord]s are feared and considered unkillable by most Little Garden inhabitants, even by Gods and other [Demon Lord]s: The three mentioned are among what are called [Last Embryo], they are the first beings to be called a [Demon Lord] and their actions/behavior was the main reason why a [Demon Lord] was called a 'natural disaster'.
 * Azi Dahaka - Said to have enough strength to kill a million Gods. He fought against the Divine Army alone and they were unable to kill him, they were only able to seal him.
 * End Emptiness - Called the ”Strongest God-killer” by Garol Gundark, a living wind that consumes everything.
 * Dystopia - Only mentioned by Shiroyasha, but is implied to be equal to the other two.

It is said that [Gift Games] and [Host Master Authority] were created as a counter-measure for the [Last Embryo] demon lords.

All the demon lords shown so far in the anime are lolis.

Ranking
Demon Lords are rank in digits 1 to 6. It was said in volume 3 that a demon ranked 6 can be defeated if a group is made with enough power. A ranked 5 demon lord is strong enough to cover the world in darkness. The rank of the demon lord shows the rank of their community not how strong the demon lord is.

Classes
Divine Class - natural gods/ given divinity

Star Class/Celestial - beings superior to the Divine Class, being the group that are on the Giving end and all other inferior classes being on the Receiving end of their Gifts.

Pure Breed Class - eudemons that stems from the original dragon seed

Known Demon Lords

 * Shiroyasha
 * Black Percher
 * Halloween Queen
 * Azi Dahaka
 * Maxwell
 * End Emptiness
 * Dystopia

Former Demon Lords

 * Leticia Draculair
 * Black Percher/Pest
 * Shiroyasha- may have returned to Demon Lord status after returning her Divinity.(will confirm later)

Demon Kings

 * “Great Sage Equalling Heaven” -- Handsome Monkey God Sun Wu Kong
 * “Great Sage Who Pacifies Heaven”--- Bull Demon King
 * “Great Sage Who Devastate Seas” -- Saurian Demon King . / Kouryuu
 * “Great Sage Who Leaves Heaven in Disarray” Roc Demon King / Karyou-chan
 * All the others are said to be dead. Demon King of Confusion is not part of this group...

Non-Demon Lords
The following are NOT demon lords, although often mistaken as such.
 * Weser - He is the 'true' legend of the Piper of Hamelin, however, he is still a low-level demon.
 * Algol - She is a Celestial Body, often referred to as a former demon lord in legends, but defeated and now subordinated.
 * Lauis Perseus - He is a mere leader of a community.
 * Sandora - She is the leader of Salamandra and a floor master but it is questionable whether she can be called a Demon Lord or not after Volume7 but she is non Demon Lord up till Volume 6.
 * Galdo Gasper - He is a mere leader of a community that has been demonised.
 * Will-o-the-Ignis-Fatuus - She's mentioned as a 'great' demon that manifests on the border of life and death.