Ultraman Belial

"Stand for all eternity in the gaze of your fallen people!"

- Belial to Father of Ultra, shortly before he steals the Plasma Spark. Ultraman Belial is a major antagonist in the Ultra series franchise. He is the main villain of Mega Monster Battle: Ultra Galaxy Legends The Movie and Ultraman Zero: The Revenge of Belial.

Belial was one of the most powerful and respected warriors in the Land of Light, until greed overcame him and he tried to steal the Plasma Spark to have its power for himself. However, the light of the Spark was too much for him and he was banished to an asteroid for his crimes against the Ultras, where he was corrupted by the spirit of Reiblood Seijin and became the dark Ultra he is now. With the Giga Battlenizer, he tried to take over the Land of Light with an army of monsters, but was defeated by Ultraman King and imprisoned in the moon of Ultra Planet. Many years later, he broke free and was nearly succesful this time, but was defeated by Ultraman Zero. He survived and became Kaiser Belial, but Zero defeated him once for all in his Shining Form. He presumably survived but has yet to attempt anything more.
 * Arc Belial subtitle: Super Galaxy Great Emperor (超銀河大帝Chō Ginga Daitei?)
 * Kaiser Darkness subtitle: Dark Great Emperor (暗黒大皇帝 Ankoku Dai Kōtei?)

History
As revealed by Ultraman Mebius (in his human disguise of Mirai Hibino) to Rei, Ultraman Belial was a highly powerful, respected Ultra warrior who was the comrade of Ultraman Ken (Father of Ultra). Together they fought against Empera Seijin and his army of monsters when they tried to take over the Land of Light. The Emperor's great power impressed Belial. Afterwards, Ken was elevated to the position of the Space Garrison's Supreme Commander, much to Belial's hurt pride, who then attempted to steal the Plasma Spark's core from its tower. However, the light emanating from the Spark was too much for Belial and it caused him great pain. The other Ultras banished Belial to a barren asteroid for his crime.

Unbeknownst to them, however, Belial was approached by the disembodied spirit of Reiblood Seijin. The alien claimed he'd give Belial the power he desired so much, and then forcibly merged with the fallen Ultra, twisting the once proud warrior into a being of pure darkness and evil. Reiblood gave Belial the Giga Battlenizer, which he used to command an army of 100 monsters to take over the Land of Light, all while receiving orders from Reiblood to destroy the Ultras once and for all. Belial easily defeated Ken, his wife Marie (Mother of Ultra) and Zoffy, but he was stopped in his tracks by Ultraman King, who took the Battlenizer away from him and imprisoned Belial in the core of the newly formed Space Prison which became the moon of Planet Ultra. King then threw the Battlenizer away in the Valley of Flames, which was guarded by an Ex Zetton.

The Land of Light remained in peace for the next twenty thousand years until a Zarab Seijin who had retrieved the Battlenizer came to the Space Prison and released Belial in the hopes of making an alliance with him to take over the universe, but the foolish alien was quickly betrayed and killed by Belial. Belial was then confronted by Ultraman Taro leading a group of warriors, but he easily overpowered them all. Landing upon the Land of Light, Belial showed all of the Ultramen a defeated Taro and was engaged in battle by all the residents of Planet Ultra. Belial easily shrugged off the Ultra heroes and made his way to the Plasma Spark tower, defeating the last wave of heroes and fighting Father of Ultra as well. Father of Ultra was gaining the upper hand at first, but was beaten when Belial hit him in the scar he had gained from his battle against the Emperor with his Battle Nizer. Mother of Ultra fought against Belial, but she too was defeated as well. As Belial was about to kill Ken and Marie with his beam, their son, Taro, jumped in front of his parents to protect them, getting hit with the beam. Belial decided not to kill them, but he nonetheless took away the Plasma Spark and flew with it. Withouth the Spark's light, Planet Ultra became a dark, frozen wasteland and every Ultra (save for Ultraman, Ultra Seven and Mebius) was helplessly frozen solid, with only a bit of light being protected by an entombed Taro. Belial then flew to the Monster Graveyard.

Upon arriving in the graveyard, Belial resurrected his entire army of 100 monsters, but was met with oposition from