Much decoration was made so that its image would not be compared to final villains of past Ultra Series. The design aims to unify the image of Belial by retaining the colouring pattern. The staffs have troubles in maintaining the suit due to its fragile structure as a result of deciding its appearance late. Since the antagonist characters are all robots and humanoid, a monstrous character was proposed. Arch Belial: It was labelled as Tyrant Belial ( タイラントベリアル, Tairanto Beriaru) during the initial concept.He also complains on how he struggled wearing the Belial Mantle due to weighing about 10 kg. Suit actor Hiroshi Suenaga mentions that Belial is supposedly to have the calmness of an emperor in contrast to his brutish trait from the last movie.
Under request of director Yuichi Abe, the claws are elongated, forming Kaiser Belial Claws. Kaiser Belial's suit was modified from the original Belial, where it received new mask and the neck portion modified to better fit the mantle. The original draft was meant for Belial to wear a set of armour but due to the lack of improvement, it was reduced to face scar and mantle.
Belial's suit was simultaneously made with Ultraman Zero, based on wetsuits with the materials shaped in a three-dimensional appearance. As for his movements, this was instructed by the director Koichi Sakamoto. 2.3 Ultraman Zero: The Revenge of Belialīelial is designed by Masayuki Gotou and Junya Okabe, who used a shark as his motif basis.
His suit actor was Hirokazu Iwakami ( 岩上 弘数, Iwakami Hirokazu) in the first movie and Hiroshi Suenaga ( 末永 博志, Suenaga Hiroshi) as of Kaiser Belial. Starting from Ultra Zero Fight 2 and so on, he was voiced by Yūki Ono ( 小野 友樹, Ono Yūki). In Mega Monster Battle: Ultra Galaxy and Revenge of Belial, Ultraman Belial was voiced by comedian Hiroyuki Miyasako ( 宮迫 博之, Miyasako Hiroyuki) of the manzai duo Ameagari Kesshitai.
In Ultraman Geed, Belial was revealed to have fathered the series namesake Ultraman, who was born from his own genetic material. Uniquely among other evil Ultras, Belial is the first whose origin is from the Land of Light, like most of the Showa Ultras. Ever since then, the two have been archenemies, constantly clashing should they cross paths. He was imprisoned by Ultraman King for attempting to invade the Land of Light, but was eventually freed by Alien Zarab many years later and defeated by Ultraman Zero. He was originally an Ultra Warrior of the Land of Light, but his proud nature caused him to try and harness the power of the Land of Light's power source, the Plasma Spark, which led to his banishment and transformation into his current monstrous state after being merged with Alien Raybrad. Ultraman Belial ( ウルトラマンベリアル, Urutoraman Beriaru) was initially the main antagonist of the 2009 film Mega Monster Battle: Ultra Galaxy, and has made subsequent appearances in the Ultra Series.