Being an Ultraman in disguise, Gen displays excellent body performance and senses but due to his young age, he is prone to make irrational decisions and would even pick a fight with others.
However, Gen builds up a character development as the series progressed thanks to his interaction with humans and training provided by Dan, as well as protecting Earth while maintaining friendship with MAC members.
By the time MAC was annihilated in episode 40, Gen and Toru live with the Miyama family as they team up to investigate Saucer Monster attacks through his previous experiences.
[b][2][3][4][5] Being an Ultraman from another world, Leo's time limit on Earth is 2 minutes and 40 seconds, while his abdomen bears the Secret Sign (シークレットサイン, Shīkuretto Sain) that functions as coat of arms for L77 inhabitants.
One of the students of Jonan Sports Center, Tooru views Gen as an older brother, especially after being orphaned by Alien Tsuruk and was adopted by Momoko alongside his younger sister Kaoru.
The loss of his family members and his close friends nearly drove Tooru to the point of despair, which Nova exploited but slowly moves on with Gen's moral support.
The floating headquarters are MAC Stations (MACステーション, Makku Sutēshon), operating above the major cities of United States, Europe, Africa, and Asia.
Eventually in episode 40, all officers except Dan and Gen were killed when Silver Bloome destroyed the Asia branch MAC Station.
[20] Being a former captor of the Alien Magma race, the Magmatic Chain (マグマチックチェーン, Magumachikku Chēn) on his left thigh serves as a reminder from his fateful day before Ultraman King rescued him.
Ultraman King would later on expose Babarue's deception, allowing Leo to save his younger brother and undo the damages his impostor had made.
[24][25] In the past, King had rescued Astra from Alien Magma's captivity but was unable to destroy the Magmatic Chain on his left thigh.
[21] King first appeared in episode 26 to help Leo after he was shrunken by an alien sorcerer Pressure, giving the former his Ultra Mantle as an advantage in combat.
[23] Melos (メロス, Merosu) is the captain of Inter-Galactic Defense Force's Andromeda Nebula Branch and is one of the protagonists of The Ultraman manga, in addition to Zoffy.
Melos wears the Cosmo Tector (コスモテクター, Kosumo Tekutā) armor which granted his a number of arsenals, such as Andrang (アンドラン, Andoran) boomerang and Andro Laser N75 (アンドロレーザーN75, Andoro Rēzā Enu Nanajū-go) shoulder cannons.
While lacking the mantle, Magma retained the same abilities and weapon as first episode in addition to Arrow Ray (アロー光線, Arō Kōsen), shooting a stream of needles from his hand.
Unfortunately this become his undoing as Dan summoned Kotaro, who becomes Taro and performed Double Strium Ray against Gorgo to kill the bounty hunter.
[29][39][40] After freezing Astra, Babarue took the form of Imit-Astra (にせアストラ, Nise Asutora) and steal the Ultra Key (ウルトラキー, Urutora Kī) to send the Land of Light towards a collision with Earth.
[41][42] When the Ultra Brothers arrived on Earth, Imit-Astra deceived Leo into protecting him from the Ultra Brothers, to the point of being a forced meat shield from their combined attack until Ultraman King arrived and exposed Babarue's true identity, breaking the Key so he couldn't use it for its alternate purpose, a superweapon capable of blowing planets to pieces with a single shot.
Commander Black is notable for being the first and only antagonist in the Ultra Series to completely wipe out a human team, using Silver Bloome to kill and consume almost everyone in MAC, with only Dan and Gen escaping with their lives.
[46] The Saucer Creatures (円盤生物, Enban Seibutsu, 40-51)[e] are a type of Kaiju deployed from the demonic planet Black Star (ブラックスター, Burakku Sutā).
Unfortunately, the black hole itself empowers Jackal long enough for him to escape and lead his army in an attempted genocide against the Ultra Warriors, forcing the survivors to take refuge on Earth.
As with all male characters, Demon King Jackal is voiced by Koichi Yamadera when The Ultraman was adapted into a 2015 short animation.