Jean-nine (ジャンナイン, Jan Nain,Jean-nine?) is the robot that based on Jean-bot and is Jean-bot's younger brother created by Beatstar. He was named Jean-killer by Beatstar, later renamed by Princess Emerana as Jean-nine at the end of Beatstar's menace he joined Ultimate Force Zero .
After Beatstar captured Jean-bot and Emerana in a giant sphere, Beatstar created the ultimate robot based on Jean-bot, Jean-killer. The rest of the team tried to help them before they were dragged in, but it was too late as the gate closed and it disappeared. The giant sphere appears in another dimension right when Hyuga and Rei were going to meet up with their ZAP SPACY team at Planet Buram for a vacation. As the giant sphere was heading to Planet Buram Hyuga contacts Kumano to evacuate the population off the planet as fast as possible. Rei found entry through the damaged gate, in there they found Emerana and are attacked by Legioniod Beta, after Gomora defeated it Ace Killer, King Joe and Imperializer appeared and defeated Gomora. With arrival of Ultimate Force Zero as they defeated them, Beatstar sent Jean-killer to fight Ultimate Force Zero and they were easily defeated, brainwashed and with red eyes Jean-bot arrived and attacks Emerana, Rei and Hyuga, Rei tried to hold him off with Litra as Gomora hasn't healed from the damage, with Litra defeated and Jean-bot was going to kill Litra, Emerana stands before Jean-bot then orders him to stop as Jean-bot held his attack and Jean-killer also heard her voice and stopped attacking Ultimate Force Zero then paid attention at Emerana and his eye began to turn from red to yellow but it stop turning at all as moment that Glenfire attacks him again. After Zero takes him far away and followed by Glenfire and Mirror Knight, Jean-bot began to regain his consciousness but he had to shut down his system to resist Beatstar's control. Jean-bot told Emerana, Rei and Hyuga about everything he knows about Beatstar and Jean-killer, Hyuga told Emerana that when she ordered Jean-bot to stop, Jean-killer also noticed and stop as well. Emerana begins to think that Jean-killer also has a heart like Jean-bot as he was based on him and makes Jean-killer Jean-bot's younger brother then they started to repair Jean-bot with help of Kumano's knowledge. As the fighting with Zero continues, before Zero had a chance to defeat Jean-killer, Jean-bot stops Zero in time and tells everyone that he is his brother, the rest of the team is surprised when Jean-bot try to persuade Jean-killer that living-life forms is the not enemy, as he still under the control of Beatstar he continued to attack Jean-bot and the team. Emerana arrives and persuades him to open his heart to the truth to make up his own mind, he responds but Beatstar forcefully gains control of him again and he attacks Emerena with beams from his eyes and holds back the team with electric blasts to make them stay where they are, even how much Rei tried to stop her, Hyuga told Rei that they should trust her. She still tries to convince Jean-killer as she believes that Jean-killer has a heart as his attack is missed in countless times to Emerana, He stopped after he saw Emerana's tear, the team is freed and everyone is surprised when they see Jean-killer's tears. Everyone taught him about life, heart and the truth about organic lifeforms not being his enemy. Jean-killer had make up his own mind but Hyuga reminds everyone that is time growing short before sphere will hit the planet, The Team and Jean-killer destroyed all surrounding Legioniods. Ultraman, Ultraseven and Zoffy arrive to buy them time before the sphere hits the planet. Jean-bot begged Jean-killer to reveal Beatstar's Location Jean-killer told them he's at a half cut moon. The team jump up to the moon and found a several of King Joes and Imperisers. Jean-bot, Glenfire, Mirror Knight and Rei summoned Gomora to hold them for Zero, so Zero will be able to stop Beatstar. As Beatstar won't allow the sphere to stop without a fight, Zero was over powered, Beatstar told Zero to give up but Zero won't give up and tells Beatstar that Living-life forms could learn from their own failure to stand up again even robot like Jean-killer as well, at that moment Zero is Pushing back Beatstar with Jean-killer's help Zero is able to stand and fight. Jean-killer tried to persuade Beatstar to reconsider that the Living-Life form is not enemy but Beatstar refused. Jean-killer fought against Beatstar with Hyuga as the motion control pilot, Beatstar is defeated by his off calculation that he only used all Jean-killer fighting style data to against him, Zero combined his Twin Eye sluggers and destroys Beatstar. Before his death Beatstar admitted that he just fear that living-life form will turn evil like his creator. After Everything is over Jean-killer had been renamed by Emerana as "Jean-nine" and Zero had him joined The Team as well. Emerana told Jean-bot to be a good big brother to him. After Ultraman, Ultraseven and Zoffy left to Land of Light, Ultimate Force Zero is ready to save Universe again.
Like the rest of Ultimate Force Zero, Jean-nine waited for Zero to finish his training in the monster graveyard. After Zero's adventure their he and the rest of the team greated and made their way back to the Living Dimension
While Zero was attacked by the Darkness Five (save Alien Hipporoto and Alien Mephilas) and Tyrant, Jean-nine joined Ultimate force Zero to hold them of while Zero went to rescue Pigmon. After Zero being possessed by Belial and became Zero Darkness, Jean-nine gives the evil hero a greeting. However, Jean-bot senses that Zero becoming evil and push away Jean-nine from Zero Darkness' Dark Energy Slash. Unfortunately, it makes Jean-bot heavily damaged and passed away. Seeing his brother "die" Jean-nine become run amok. This also become more when Zero Darkness killed Mirror Knight. Jean-nine then starts attacking Zero Darkness. However, all of his attacks is easily dodged by Zero Darkness. Even Zero Darkness makes heavy damages by just pushing Jean-nine. With Jean-nine tired off the battle, Zero Darkness finish the battle using Dark Twin Shoot. The attack also heavily damaged Jean-nine and he meets the same fate like his brother. While, Ultraman Zero stan like a statue, Jean-bot and the others appears behind Zero. After a few talking, they gonna leaves. However, before they leave, they shouted Zero's name for encourage him to revive.
Jean-nine and the others arrive to save Zero
Jean-fight!
Jean Brothers vs Dark Terror
Jean-nine attacking Tyrant
Jean Brothers teamwork finisher
Double Jean Knuckle!!!
Jean-bot & Jean-nine refuse to give up after their attack didn't affect Dark Terror
Jean-nine know that person with dark energies
Jean-nine been saved by his brother from attacking
Jean-nine shocked looking at broken Jean-bot(his brother)
Jean-nine run amok after he find out his brother 'die'
Jean-nine about to fight Zero Darkness(Belial) for his revenge and his brother's life!
Jean-nine been kicked by Zero Darkness(Belial)
Later,Jean-nine fight Zero Darkness(Belial)
Jean-nine try to punch Zero Darkness(Belial)
Zero Darkness(Belial) dodge Jean-nine's punch
Jean-nine's punch been stopped by Zero Darkness(Belial)
Jean-nine to say something to Zero Darkness(Belial) about real Zero
Jean-nine not done yet to Zero Darkness(Belial)
While punching Zero Darkness(Belial),Jean-nine crying
Crying Jean-nine been push by Zero Darkness(Belial)
Later,Jean-nine been defeated by Zero Darkness(Belial's Dark Twin Shot that cause Jean-nine body slashed become half
Jean-nine's half body throw away to his 'shutdown' brother
While his body slashed become half...
Jean-nine about to go to his 'shutdown' brother
Jean-nine's hand almot got his brother's hand but....
Jean-nine already 'shutdown'
Inside Zero Darkness(Belial),Jean-bot & other appear from behind Zero
Jean-bot talking to Zero after Jean-nine done talking & before Mirror Knight and Glenfire
They about to leave Zero
Before leaving,they want to say something to Zero then...
Jean-nine will reappear in the Ultraman Ginga series where he has been turned into a Spark Doll by an unknown mysterious and evil entity. Tomoya Ichijouji, Hikaru Raido's rival, will be able to control Jean-nine by using a device known as the Gunpad. He will be able to use the "Jean Buster", "Jean Punch", and his finisher move "Jean Cannon". Jean-nine will possess a new form: Jean-star.
Jean-killer at the moment he heard Emerana's ordered Jean-bot to stop.
Jean-bot trying to persuade him to learn the truth.
Jean-killer's tears
Jean-killer saves Zero from Beatstar.
Yellowed eyes Jean-killer makes a decision.
Hyuga as Jean-killer's motion control pilot.
Zero had Jean-killer joined Ultimate Force Zero and found a better name for him, Emerana suggests Jean-nine as he is the 9th hero who fought along side Ultimate Force Zero.
Ultimate Force Zero is going to save Universes again
Jean-killer red eye
Jean-Nine Toy
Jean-Nine, along with his vehicle mode, Jean-Star.