This is the character page for the 1998-1999 tokusatsu Ultra Series Ultraman Gaia.
Protagonists Gamu Takayama is the main character and hailed from Chiba Prefecture. Aged 20 years old, he was a member of Alchemy Stars, and obtained a doctorate in Quantum physics at the age of 17. Back in his childhood days, Gamu was usually ostracized by other children due to his exceptional intelligence but he does have a pure heart, choosing not to provoke a fight and is on good terms with several people he has met.
At the beginning of the series, Gamu enrolled in the Quantum Physics Laboratory of Jonan University and met Ultraman Gaia in an experiment to discover the will of the Earth. During C.O.V.'s invasion, he was bestowed with Gaia's light to fight against the monster and was hired as the XIG's analyzer. His XIG Fighter possesses a remote control system that allowed him to transform without raising suspicions. While fighting as Gaia, Gamu always found himself clashing with an Alchemy Stars deserter Fujimiya, who gained the ability to transform into Agul. Their connection caused him to be fired from XIG in episode 23 until he was hired again under Commander Ishimuro's wishes. Gamu accidentally revealed his identity as Gaia, and Fujimiya's identity as well, to his XIG teammates when he was witnessing Agul's defeat by Zebubu. After Gaia and Agul's defeat by Zogu, Gamu and Fujimiya's identities were exposed worldwide and he briefly regained the ability to transform to fight against her. In the aftermath of the battle, Gamu resumed his life as a university student. In Once Again Gaia, Gamu was given the position of an irregular soldier when briefly joining the XIG again. His encounter with Rinar provided him the power to transform into Gaia again and fight against Gakuzom.
Despite his excellence in the scientific field, Gamu is shown to be weak in terms of physical fitness and eventually trains harder as the series progresses to keep up Gaia's performance. This becomes essential when Gaia received the light of Agul as it needed a stronger body to catch up with the increase of power. In The Battle In Hyperspace, Gamu's favorite book is the Irish novel Gulliver's Travels, being the source of his inspiration in Quantum physics. His main transformation device is the , lifting it upwards when transforming into Ultraman Gaia.
Gamu Takayama is portrayed by and in his childhood. The setting of Gamu is supposedly to be a "boy genius", but Takeshi is able to portray him in several feats. Takeshi himself overjoyed when he was able to reprise Gamu in a separate work, Superior Ultraman 8 Brothers, although Gamu in said movie is portrayed as a separate iteration to the original television series.
Hiroya Fujimiya is the 22 year old Alchemy Star deserter, serving as both rival and senior to Gamu. He spent his time searching for answers to counter the threat of Radical Destruction Bringer through the prediction of Chrisis and was eventually bestowed with the light of Agul, three years before Gamu obtained Gaia's light.
Having been deceived by Chrisis that humanity would be Earth's destroyer, Fujimiya deserted the Alchemy Stars and became a wanted person in the eyes of G.U.A.R.D. His point of view usually clashed with the more idealistic Gamu, which gradually became an intense rivalry. He also met the KCB reporter, Reiko on various occasions. With the death of his colleague Kyoko Inamori, he reached his breaking point and this led to him awakening various monsters from around the Earth via Agul's power. With the advent of Zoruim and Gamu revealing that his supercomputer Chrisis was long ago hacked, Fujimiya descended into the point of breakdown, surrendering Agul's light to Gamu before seemingly vanishing in an explosion from a fireball. Although surviving the attack, Fujimiya tried multiple times to attack the Radical Destruction Bringer with his own resources before he fell into despair and became near suicidal. At the time of Gamu's capture by Σ-Zuiguru, Fujimiya regained both his will and Agul's light to save his comrade, eventually leading him to join forces with Gamu. His identity as Agul was accidentally exposed by Gamu after witnessing his defeat by Zebubu, simultaneously revealing his identity as Gaia to the XIG members. After losing Agul's light to Zogu, Fujimiya's Chrisis was put to use by G.U.A.R.D. as they briefly restore the Ultras' powers for a counterattack. In the epilogue, Fujimiya left for parts unknown while wearing bright clothes and smiling.
In Once Again Gaia, Fujimiya once again went on the run from G.U.A.R.D. after attempts to lure Zonnel away from an urban area went awry. While hiding, he met Melissa, a Rinar who restore Agul's light to the Agulater.
Although he is not affiliated to any group, Fujimiya is rich enough to own a private jet and was seen twice riding a motorcycle. Agul's light is stored within the , a brace worn on the right arm which spins 180 degree before opening up its wing-like appendage to reveal Agul's light. In Once Again Gaia, Fujimiya held the device directly on his hand and transform in a similar manner to Gamu with his Esplender. He can also channel Agul's power, such as moving in a blinding speed to evade G.U.A.R.D. troops and break into the Geo Base.
Hiroya Fujimiya is portrayed by , who in real life is married to Yukari Ishida, Reiko Yoshii's actor in the same series. In Superior Ultraman 8 Brothers, both of their characters' alternate iterations were portrayed as a married couple with their real life daughter on the set.
Tsutomu Niiboshi is the main character of The Battle in Hyperspace.
A boy whose grades failing from addiction to Ultramen, his encounter with Lisa allowed him to bring Gamu to his universe but accidentally set forth the motion of events. During King of Mons' rampage, Tsutomu was able to wish for Tiga and Dyna's arrival to assist Gaia and turn the tables of the battle. Although having wished for the Red sphere (and Lisa)'s nonexistence, he met Lisa as a normal girl in the repeated day as they became fast friends.
Tsutomu Niiboshi is portrayed by .
Lisa Nanase is one of the characters of The Battle in Hyperspace.
She is the interface of , a device created by mankind from another world but sought a person that could wish its nonexistence after the dangerous potential it held. Arriving on Tsutomu's world, she developed an interest on the boy and allowed him to wish for Gamu's existence to their world. Unfortunately, it also fell into the hands of Hiroshi Kashimada, who wished Satan Bizor to their world as well. After being sent back to his world, Gamu decided to return after being visited by Lisa's vision. With Hiroshi and his friends influenced by the Red sphere's power, they created King of Mons as a result until Tsutomu knock them back to their senses and Gaia arrived. Tsutomu would later wish for Tiga and Dyna before wishing for the ball to exist. Despite its nonexistence and the event was reset, Lisa appeared as a normal girl who was transferred to Tsutomu's class as they quickly became friends.
Lisa Nanase is portrayed by and voiced by as the Red Sphere. Director Kazuya Konaka mentioned that the Red Sphere's took the appearance of Lisa from a girl who Tsutomu would meet in the future (who he met at the last scene of the movie), making Tsutomu's image as "protector of the future". He also envisioned the Red Sphere's role based on from Ultraman and due to this, a lot of comedic elements were placed in the movie's plot.
XIG is a group of elite members of G.U.A.R.D. which act as the forefront in against Radical Destruction Bringer. Their main base of operation is the Aerial Base, later on relocated to Geo Base after its destruction by Mokian as part of a Kamikaze attack.
Operation Crew : The main operating team which provides plans and strategies. Their main base of operation is the Aerial Base's command room. : The XIG commander, aged 45 years old. He is capable of understanding the capabilities of other officers and at the same time trying to uncover the true intention of Radical Destruction Bringer. He is well aware of Gamu's true identity as Gaia but kept it to himself until XIG's migration to Geo Base after Mokian's assault. His family consist of his wife and a son. He is portrayed by . : Aged 33 years old, he was previously the lieutenant of an air force. Aside from being the field commander, he also assist the pilots in the field by piloting the Peace Carry. Because of his weakness for children, he assigns the role of tour guide to Gamu in episode 40 during a school tour in Aerial Base. He is portrayed by . : An excellent operator in the command room. Aged 21, she previously harbored an admiration for Kajio of Team Lightning but stepped down due to his relationship with her sister. Despite her dark past as a child, she has a bright personality and slowly develop feelings for Gamu despite being initially cold towards him, to the point of acting as an elder sister figure. She is portrayed by and as a child. : A 20 year old half Australian operator. Aside from her job, she is also an expert in printed circuit board and keeps a black cat as a pet. Compared to Atsuko's cold outlook, Georgie is friendlier with Gamu and sometimes went out with him. Despite her interest to get married, she has yet to get a boyfriend. She is portrayed by . : A fill-in operator during Atsuko or Georgie's absence, wearing a different uniform. She almost lacking an expression and worked alongside the two when XIG were relocated to Geo Base. She is portrayed by .
Fighter Teams : An air force team organized by young ace pilots, having the largest number of times of exercise and as such called "Top Guns" during their early days in defense force. : Aged 24 years old and the leader of Team Lightning. As Gamu was a student who quickly enlisted into XIG, Kajio shows initial dissatisfaction in the rookie but grew acceptance to him, even portraying as an older brother-like figure. Despite his pride and overconfidence, Kajio is not good in socializing and rarely talks with people when outside missions. Despite his proficiency in piloting, Kajio has a poor aiming skills, which eventually improved in episode 34. As of Psycho Mezard II's assault, he is dating Ritsuko, Atsuko's sister. He is portrayed by . : Aged 23 years old. Despite his delicate appearance, his body and mind are well trained. Although he usually provides Kajio with advises, Kitada is prone to crashes and is more interested in Gamu. He is portrayed by . : Aged 25 years old. Although being the oldest of the team member, he has a respect for his leader Kajio. Alongside Kitada, he is usually prone to crashed and often gets scold by Kajio. Since Gaia occasionally saves him during crashes, Ohgawara labels him as a friend, which caused trouble for him when he was forced to attack the Ultra's own impostor, Meemos. He is portrayed by . : An air force team of veteran pilots. The way of fighting by making use of veteran teamwork also surpasses Team Lightning. During Aeroviper's assault, the team gets to watch a future where Aerial Base was destroyed, with the only way to save it is for the team to sacrifice their lives. After Gamu trails them into the past, they were able to destroy said monster and therefore negated its own existence. : Aged 34 years old and is the Team Falcon's leader. Due to his experience in the defense force, he gains complete trust from Tsutsumi, although he believes that young pilots should obtain more attention. Unlike Kajio, Yoneda is willing to receive advice from Gamu during tactical missions. In Once Again Gaia, Yoneda picks Gamu from his university to assist XIG in Gakzom's attack. He is portrayed by . : Aged 33 years old, he was Kajio's senior during the era of defense force. He was portrayed by . : Aged 32 years old. He is portrayed by , who would portray Kazuya Serizawa in Ultraman Mebius.