Juggler and Gai originally lived on the same planet and worked in the same rescue force. The Forbidden Forest While both are actually partners, when given the chance, they would compete with each other to prove the best among themselves. One day, both went to climb the Crusader's Peak, where Juggler was rejected and his partner Gai transformed into Ultraman Orb. Although he refused to be acknowledged as a supporter, he accompanied Gai on a mission as they learned of Psychi's plans to use the Bezelbs to rule the universe. They made a stop on Planet Rurin when Gai detected a cry of help, coming from an alien boy whose parents were being controlled by a Bezelb before said monster killed them. Glittering Star

After Gai/Orb's first battle, they left the alien boy at a nearby village and chased an infected Bemstar into space, crossing paths with the Kanon Royal Guards Micott and Ricca, eventually joining forces to go to Planet Zain, where the Bezelb nest was. Last ~Fellow~ Echo

Arriving at Psychi's base, Juggler held off several Bezelbs for the guardswomen to rescue their captain Shinra as he in turn saved Juggler from the effects of Kugutsu, using a seed from Planet Kanon's Tree of Life. Gai joined late with his senior Asuka but due to Psychi sabotaging their spacecraft, the journey back to Planet Kanon was delayed. Afterwards ~Tragedy~

In my own eyes, that tree is a demon.

Juggler

Orb, Dyna and Cosmos joined the Kanon defense forces in against the Bezelb invasion, followed by the rest with Juggler participating in the battle as well. When the War Deity was infected with Kugutsu, Juggler provided Orb with the seed of the Tree of Life and they successfully cure her. War Deity His relief was short-lived when Micott died from a Bezelb and his wish for power was realized by his turning into a black demon clad in copper armor.

Seeing the tree as a devil, and, somehow, realized that destroying it would end the conflict, Juggler cut it down it to protect the world and Amate. Amate, seeing this, hurled herself into the path of his attack, but was knocked aside and suffered a temporary injury, and she then used an energy beam to destroy the falling tree, which seemed to somehow resonate with and also destroy it's roots. Juggler's decision was proven correct, with Dr. Psychi calling for a retreat after the tree fell, but it was not only questioned by the preceding Ultras, he was also branded as a threat by Planet Kanon for the injury Amate sustained from choosing to jump into his attack and solely blamed for destroying the Tree. This eventually forced him to leave and denounce his support for Gai. Wrap ~Dazzling~ Desiring to surpass the Ultra Warriors, he arrived on an alternate Earth to fight against Bezelbs and save Gai on multiple occasions. Sound Touch ~Theory~ Flower Storm Heat Haze

With Psyqueen being defeated by the Ultras, Juggler quietly left the scene and was last seen in Gai's vision on the Crusader's Peak of O-50. Great Land ~A New World~

You heard her; "You need to hang on, Gai!". You were so, so courageous in battle. But it's not over yet! Or rather... I won't let it end. Because this is nothing... compared to true hell.

Jugglus Juggler's word before slaying Naomi.

Back then, before I realized it, I was doing everything I could to save her. That woman actually smiled at me. I had no idea what I was doing, so I ran off with my tail between my legs. The need to help the weak is Gai's weakness!

Jugglus Juggler telling his past when saving Natasha, The Wandering Sun

While being held prisoner at VTL headquarters, Jugglus Juggler used this chance to reveal the arrival of Magatano-Orochi. He also manipulated them into firing the missile to Tokyo Tower and inadvertently unleash the ultimate Lord Monster on the Earth, dooming the human race.

Later on, while Magatano-Orochi was fighting Ultraman Orb, Jugglus Juggler broke free from his containment, defeated the guards off-screen and kidnapped Naomi. The Giga Lord Monster Strikes Back He told him that Earth would soon disappear, that the void of darkness was the only thing that was eternal in everyone in the universe, and laughed at Gai's rebuttal of eternal love. Hesitant to kill Naomi at her sudden courage, Juggler rescued her from a crashed Z-VTOL. This, along with the discovery that he rescued Natasha long ago, he was redeemed in his rival's--Gai's--eye and eventually joined Orb after being persuaded by Naomi. During the battle, Juggler would sacrifice himself to restrain the monster so that Orb could deliver the final blow. Juggler would survive the attack without a scratch and watched Gai for the last time from a distance. Jugglus Juggler appeared in this series as part of the commentators alongside his fellow STORAGE members. His Majin Form physically appears in episode 7.

When Space Sevenger was low on energy, thanks to settling a quarrel between Eleking and Gazort, the mech was blind sided by Reconstructed Pandon. The two began to fight, only to be interupted by Gandar, Garamon and Alien Icarus roaring their arrival from a cliff top. The three jumped down and joined the fight, only for Alien Icarus to be downed by a back slash from Jugglus Juggler himself. He provided his team information and served as a distraction (to the point of briefly being used as a leverage against Sevenger) until Haruki arrived on the scene as Ultraman Z Beta Smash, fighting along side Sevenger until the four aggressive beasts where destroyed in a fiery explosion. Juggler quietly left his teammates once they emerged victorious and departed from the alien planet. At night, he slew the mastermind behind the attack on Space Sevenger, Alien Ghose, then ending the miniseries with claiming he'll see his former teammates again some day.On the same day as Ultraman Z's first appearance and Genegarg's invasion, Juggler salvaged the Tiga, Dyna and Gaia Ultra Medals. Chant My Name! He remained playing the role of captain, but assumed his Majin form to perform shady activities behind STORAGE's back, such as duplicating Haruki's Z Riser, clashing with Celebro on numerous occasions and fighting for the Beliarok's ownership to name a few. First Juggling Beliarok However in spite of his personal gains, Juggler developed a soft spot for his teammates and Riku, as he would resort to use whatever available methods to keep them safe. The Man Returns! His Majesty's Medal

By the time Ultroid Zero started its construction and STORAGE disbanded, Juggler quit GAFJ as a whole and exposed his identity to claim the robot for his own use. Prelude to a Nightmare Originally content on leaving Haruki's fate to Celebro, he relented and stepped in to rescue him at the last moment, forfeiting Ultroid Zero in the process. In the aftermath of Z's battle against Destrudos and the latter's reign of terror, Juggler amassed the former members of STORAGE, including Haruki, and began an effort to reclaim their headquarters. The Game to Extinction During the mutiny against SAAG, he revealed the truth about his identity to his comrades, and announced their final operation to save Yoko using the available SAA units. Piloting Windom as his Dark Z Riser was too damaged to function, Juggler and Sevenger/Inaba held Destrudos back long enough for Haruki/King Joe SC to punch his way into Destrudos to save Yoko. After Destrudos' defeat, Juggler returns to his casual dress where he stopped Celebro from escaping long enough for Yuka and Kaburagi to capture the parasite for dissection. Although Yuka asked if they would ever meet again, Juggler brushes it off and parted ways, taking his bonsai tree with him.