Deviluke

Deviluke is referred to as being the center of the galaxy, though this is probably a reference to its importance rather than its placement in the universe. The planet of Deviluke literally rules the galaxy after the galactic unification wars led by King Gid Lucione Deviluke and as such, they hold dominion over all of the planets of the galaxy and its people.

Little is known about the planet itself other than its rather gothic image,  its containing many forests, and its high level of technology. Much more is known about the citizens of Deviluke who are, at least, known to be many times stronger than Earthlings, and seem to have won their wars over the galaxy using just their own natural powers, which seem to have some sort of variety.

Appearance
All Devilukeans have tails as long as their body length and has a random shape at its end. The Devilukean princesses' tails all end with a spade shape; the Devilukean king, Gid, has a tail that ends like a trident; the palace guard commander, Zastin, has a tail like a scorpion; the royal palace guards have diamond-shaped tail end.

Powers and Abilities
All Devilukeans have superhuman strength much stronger than Earthlings. However, their strength also are stronger than most aliens of the galaxy. At one time, Lala even reached a stalemate against Yami, a well-known assassin, with just using her brute strength. However, Yami admits that living peacefully on Earth has weakened her. Another display of the Devilukeans' strength is when Gid was able to hit a tennis ball so hard that it caused Sasuga, the tennis club's advisor, to faint while standing.

Devilukeans are also able to shoot beams from the tips of their tails. However, so far, only Lala and Momo has used this power (laser beam for Lala, and lightning for Momo), so it is unknown whether this ability is only exclusive to the Devilukean princesses, or if it's exclusive to Devilukean females, or all Devilukeans can do this.

However, despite the Devilukeans' "perfect warrior" abilities, they still have weaknesses. When someone grabs, touches or pulls a Devilukean's tail, the Devilukean will lose power. However, this weakness is only apparent in Devilukean females. Therefore, the Devilukean males do not have any weaknesses revealed so far.

Royal Family

 * King of Deviluke - Gid Lucione Deviluke
 * Queen of Deviluke - Gid's wife (unnamed)
 * Princesses of Deviluke
 * 1) First Princess - Lala Satalin Deviluke
 * 2) Second Princess - Nana Astar Deviluke
 * 3) Third Princess - Momo Belia Deviluke
 * Royal Palace Guards
 * 1) Commander - Zastin
 * 2) Assistants - Maul and Smutts

Trivia

 * The second names of the Devilukean Royal Family are reference to demons.
 * 1) Gid "Lucione" Deviluke - Lucione comes from Lucifer.
 * 2) Lala "Satalin" Deviluke - Satalin comes from Satan.
 * 3) Nana "Astar" Deviluke - Astar comes from Astaroth
 * 4) Momo "Belia" Deviluke - Belia comes from Belial.
 * There have been several information about Deviluke and the Devilukeans that resembles Planet Vegeta and the Saiyans from Dragon Ball Z. Whether these resemblances are intentional or coincidental are unknown.
 * 1) The Devilukeans have superstrength, the same as Saiyans.
 * 2) Devilukean women grow weak when their tails are touched, the same as Saiyans.
 * 3) The Devilukean king, Gid, was originally regular sized, but became small later on. The same thing happened to Goku in Dragon Ball GT. However, the reason why they became small are different (Gid used a lot of his powers, thus became small, while Pilaf wished to the Dragon Balls for Goku to become smaller).
 * 4) In the first chapter of the manga (and the first episode of the anime), when Lala was showing Rito her tail, she commented that, "Even though I have a tail, that doesn't mean I transform when I see a full moon". This, however, was an intentional reference to Dragon Ball since Saiyans transform when they see full moons because of their tails.
 * 5) Both planets conquered other planets. However, in the case of Planet Deviluke, the Devilukeans conquered planets in order to unite them during the galactic unification wars while the Saiyans conquered other planets for bounty.
 * 6) Both planets are notorious across the galaxy, and the other aliens are afraid of them.