A girl whose physical body is confined at an elusive area called the "Oblivion Playhouse" (also translated as "Melody Theatre,") but can project her image so that Meros Warriors can see her. She guides and supports them, although her capacity for communication seems to be very limited. It is rumored among Meros Warriors that if her physical form can be located and resuscitated, she could unlock a power capable of wiping the Monsters off the face of the planet. Souce: Wikipedia
She was created to be the epitome of everything mortal men desire. She appears on Earth as a busty blond with a bubbly personality and the intellectual capacity of a typical household appliance. She exudes an aura of desirability so powerful that all men she encounters will eagerly do anything she wishes, with Aoi and Maya being the only exception. Women are not affected by this power, and in fact find her rather unpleasant. She also speaks in third person exclusively. As an adult, Pandora can do almost anything with her divine power, which makes her especially dangerous when combined with her poor impulse control. Her special ability, the Goddess Wish, channels her divine energy into a Wish that she usually doesn't specify-- in Volume 2 she changes a store owner's entire shop into solid gold as a thank you for helping her. When Pandora uses a Wish, she is reverted to a "lolita" form, where she looks and acts like a more well-behaved ten year old girl. To change back, Pandora always needs her slave Aoi around to kiss her and restore her powers.
Earth-type Legendz. A member of Greedo's group, G-W-Nicol. http://en.wikipedia.org/wiki/Legendz:_Yomigaeru_Ryuuou_Densetsu
Material-S is a Material, part of the system Unbreakable Dark materialized as a clone of Nanoha Takamachi during the Dark Fragment Incident. Her name is first introduced in The Battle of Aces in English Material-S and in Japanese "Exterminator of Starlight" without specific ruby-kanas. The "S" in her name is believed to stand for "Stars" or "Starlight", which are both associated with Nanoha. In The Gears of Destiny, it is revealed her rubied name is Stern the Destructor, which may be shortened as Stern. Stern is German for "Star." Her device is Luciferion. (Source: Nanoha Wikia)
Material-L is a Material, part of the system Unbreakable Dark materialized as a clone of Fate Testarossa during the Dark Fragment Incident. Her name is first introduced in The Battle of Aces in English Material-L and in Japanese "Assailant of Thunderblade" without specific ruby-kanas. The "L" in her name is believed to stand for "Lightning", which are both associated with Fate. In The Gears of Destiny, it is revealed her rubied name is Levi the Slasher, which may be shortened as Levi. Levi is a pun on "Levin," an archaic word for "Lightning." Her device is Vulnificus. (Source: Nanoha Wikia)
Ansem the Wise was a famous scientist and sage-king of Radiant Garden. To protect his people from the darkness, he and his apprentices performed research and experiments to study the heart, which resulted in the creation of the Heartless. Eventually, Ansem's apprentices were taken over by the darkness, and, when he decided to end the research, they banished him to the Realm of Darkness and Xehanort continued the research in his name.
Leader of the gods and the strongest being ever. He's the only remaining ancient god alive from more than 100.000 years. 100.000 years ago in the war between the ancient gods and the ancient dark ones he was the strongest gods warrior and he defeated the ancient dark ones and chased them down to hell. The ancient gods' leader Pan Gu feared his power and ordered him executed. When Hei Long came back from chasing the dark ones he found his beloved wife, Bai Long, almost dead by the gods decree. In a burst of anger he killed his own race and murdered all the ancient gods except him and Bai Long. In the end he couldn't save her but he tried to collect enough blood crystals to revive her. He brought 10 chosen humans children, removed their souls, and put in them some transcendent vigor from the ancient gods, thus creating the new gods only to help him collect crystal. For a 100.000 years he stayed hidden in his cave to save Bai Long from any harm and collect the blood crystals needed to revive her.