The list below refers to characters of Ultraman, a manga sequel of the original 1966 tokusatsu series of the same name.

SSSP The , abbreviated as , is an attack team that had protected the Earth from monster threats and alien invasions from the past. Following Hayata's separation from Ultraman after his defeat from Zetton, SSSP disbanded and had its original base turned into museum made for remembering the SSSP and Ultraman's missions. In truth, the SSSP operated from shadows and had since protected Hayata and his entire family from being government test subjects after discovering his connection to Ultraman and the fact that he possessed what remains from Ultraman's power. The current SSSP is now led by Edo and several remaining members of the original SSSP.

As several outlaw aliens emerge, SSSP finally revealed themselves to the society and created -empowered suits based on the original Ultraman, known as to counter these aliens. At one point, it was considered for cancellation until Shinjiro's development in his flying ability saved the project.

Voiced by: Ryohei Kimura (motion comic, anime), Megumi Han (child) (motion comic) (Japanese); Josh Hutcherson, Cassandra Lee Morris (child) (English) The 17 year old protagonist of this manga. As the son of Shin Hayata, Shinjiro inherited his father's , which gives him superhuman strength and resilience, as shown when he was able to survive from a fall at the age of 5. He also tried to master these abilities by jumping from high buildings while keeping it as a secret to resume a normal life. However, once the emergence of an alien named Bemular threatened him and his father's life, Shinjiro was forced to be enlisted as a member of SSSP. At the request of Edo, Shinjiro was provided with a finalized model of the Ultraman Suit which he used to fight against outlaw aliens, as well as inheriting the title "Ultraman". In a mock battle staged by SSSP, with the hired Red fighting against Shinjiro, the boy soon developed an additional ability to maneuver anti-gravity flight, thus saving the Utraman Suit project from cancellation. While in use of the suit, Shinjiro utilizes a similar fighting stance to the original hero and wields a pair of underneath his arms. These blades can be modified when Shinjiro utilizes the original Ultraman's , performed by having his forearms form a cross stance, with his left arm in a horizontal position and placed forward while his right arm is in a vertical position and placed backward. In contrast to the original, Shinjiro's variant had the beam released from his left Spacium Blade instead of the right arm. The small light on his chest is the (based on Ultraman's Color Timer) which can be removed to access Shinjiro's full power as a last resort tactic. Edo soon provides him with a mimicry system which allows him to become "Ultraman" via holographic disguise should the Ultraman Suit be incapable of being deployed.

Voiced by: Takayuki Sugō (motion comic), Hideyuki Tanaka (anime) (Japanese); Fred Tatasciore (English) The original "Ultraman" and Shinjiro's father. He has been given the title of Minister of Defense at the beginning of the story. Long ago in the past, he bonded with Ultraman but loses his memory after the giant left him. Following the "dissolution" of SSSP, Hayata has settled down and had a family, with a son named Shinjiro Hayata. When Shinjiro was a 5-year-old child, Hayata discovered his son's abnormality when the boy fell from a great height and finally regained his lost memories after Ide showed him the footage of Bemular attacking an airplane. Hayata also inherited the Ultraman Factor (which also passed to Shinjiro) and unknowingly had his entire family protected by his former teammates from being the government's test subjects. Due to this, Hayata enlisted into the reformed SSSP once more and had a hand in developing the Ultraman Suits. Hayata wore the prototype of the Ultraman Suit, called the Proto Suit and first used it to fight Bemular when he threatened Shinjiro's safety. But as the suit was in fact a prototype, Hayata was defeated by Bemular until Shinjiro returned with the finalized Ultraman Suit, using it to fend off against Bemular before he retreated. Hayata would later oversee his son and the entire SSSP's activities after finally passing the "Ultraman" title to Shinjiro but once again returned to action when the Ace Killer Squad strikes. He is initially reluctant to have Shinjiro employed into SSSP, wanting his son to experience a normal life. He also views the Ultraman Factor as nothing more than a "curse". The original seems to be identical to that of the finalized version, though lacking a helmet and had its color scheme being black. Hayata fights using the Ultraman's fighting stance in his memory but is comparably weaker due to being lag behind from its finalized version. When Hayata returns to action, the suit was given a helmet based on the finalized version to hide his identity. During the final battle in New York, the suit is further modified with indentations on the chest and shoulder armor, making it Hayata the counterpart to Zoffy, the leader of the Ultra Brothers.

Voiced by: Masashi Ebara (motion comic), Ken Uo (anime) (Japanese); Brian Palermo (English) A former member of the Japan Branch of the Science Special Search Party, and now chief of the . His intelligence in technology is expanded to the fact that he is able to fabricate footages, such as shrouding Bemular's plane attack as an accident to hide the alien's existence. He secretly has known that Hayata has recently transformed into Ultraman to fight monsters, revealing this fact to his friend at the Giant of Light Memorial, the secret base of the Science Special Search Party. He gives Shinjiro the Ultraman Suit and reveals the truth about his father to him. Although he usually appears stoic, he is angered by the Alien Adacic's actions.

Voiced by: Shigeru Ushiyama (motion comic, anime), (Japanese); DC Douglas (English) The last surviving member of the Alien Zetton race after SSSP destroyed them in their last invasion for Earth. Edo was approached by Ide to join the SSSP as he agreed, having lend a hand in developing the Ultraman Suits. As the presence of alien beings were supposed to be made secret, Edo bears a wristwatch that allows him to create holographic disguise of a human when walking out in the human world. Knowing that there are times when the Ultraman Suit cannot be deployed, he gave Shinjiro another mimicry system in his possession that allowed the boy to become "Ultraman" via holographic disguise. As humanity were initially unprepared for the arrival of aliens, Edo's residential area is in fact the Giant of Light Memorial. He often felt nostalgic whenever he watched the diorama display of Ultraman and Zetton, reminiscing his days as an invader. Being an Alien Zetton, Edo only needed to sleep for two minutes a day. He is later revealed to be supreme chairman of the Star Cluster Council. In the anime, Edo masterminded a scheme to finish what his people began by first destroying Ultraman's credibility with the humans through Mephisto's help before killing Shinjiro with a Zetton to cement his ideals on humanity so they would join the Star Cluster Council of their free will. When the other Ultramen intervene and restore the peoples' faith in them, Edo equips Zetton-themed armor to personally battle Shinjiro and dies fighting him. His appearance, such as wearing a business suit bears resemblance to the Alien Zetton infiltrator that appeared in episode 39 of Ultraman, along with the fact that his human form is also based on Dr. Iwamoto from said series, the same man that the Zettonian infiltrator used to disguise, though no connections between the two were revealed.

Voiced by: Tomokazu Seki (motion comic), Takuya Eguchi (anime) (Japanese); Liam O'Brien (English) A stoic officer who had worked for a long time within SSSP. Although appearing as a human with short hair and glasses, he is in fact an alien in disguise. His job is to report to SSSP of any events and is usually dwelling around the Alien City for informations from police informant Jack. He has a rivalry with Shinjiro, doubted if the youth is fit enough to become an Ultraman. He also views Ultraman nothing more as an enforcer-like figure that instantly killed his opponents, which is not shared by the boy. Moroboshi later dons his own Ultraman Suit and revealed his alien heritage to Shinjiro when they pursue Seiji Hokuto. His name is in fact based on Dan Moroboshi from Ultra Seven. Moroboshi's Ultraman Suit is called , which requires no Ultraman Factor and has a singular visor. His main weapon is the katana and several throwing knives. According to Moroboshi, because of the lack of Ultraman Factor, his fighting skills relies on weaponries, as well as his swordsmanship. The Spacium Sword is empowered by Spacium energies and is capable of slicing through harder materials such as Alien Bris' exoskeleton. Soon, the Ultraman Suit was upgraded into Ver.7.2, which gives him an additional Spacium, two machine guns that are stored in his shoulders and a pair of cannons. The entire suit and its throwing knives are based on Ultraseven and his Eye Slugger. Meanwhile, the Wide Shot cannons is based on the similarly finisher attack of said giant warrior.

Voiced by: Hiroko Sakurai (motion comic) (Japanese) A former member of the Science Special Search Team with Hayata and Ide, but is now Moroboshi's superior officer. She is the only character to be reprised by the actor from the original tokusatsu series.

Other Ultramen

Voiced by: Maaya Uchida (motion comic), Sumire Morohoshi (anime) (Japanese); Tara Sands (English) A popular singer around Shinjiro's age. Her real name is . She is a fan of the original Ultraman, a trait that was passed from her father, and has fallen for the human-sized "Ultraman" after he saved her from Adacic's assault, thus becoming the inspiration for her third single, . She has no awareness of "Ultraman's" true identity, but once, while visiting the Giant of Light Memorial, she appeared to Shinjiro and asked if they had met each other somewhere else. Rena has a strained relationship with her father due his obsession unmasking "Ultraman's" identity. She would later learn her mother was an alien who received a blood transfusion from Shin Hayata when she got injured during his fight with Zetton before she died from complications, giving Rena the Ultraman Factor as consequence. She wears the to become an Ultrawoman.

Voiced by: Megumi Han (motion comic, anime) (Japanese); Gunnar Sizemore (English) A 16-year-old student in Shinjiro's school, later revealed to one of the survivors that Bemular saved during Ace Killer's attack, placed in Yapool's care while outfitted with prosthetic limbs. He is skilled in investigating and views Shinjiro as an older brother/senior, as well as supporting him through the use of his own Ultraman Suit. Although Shinjiro has no qualms with it, Moroboshi refuses to acknowledge the boy as an "Ultraman" and almost killed him if it weren't for Shinjiro. His main reason of fighting as an Ultraman, influenced by his desire for Yuko to be happy, is killing Ace Killer to avenge those who died in the plane crash incident and eliminate those who refuses coexistence between humans and aliens. His name is based on the main lead protagonist of Ultraman Ace. Hokuto's Ultraman Suit is called Ver.A, which materializes by pounding his prosthetic fists together. This suit is an analogous of Ultraman Ace from his titular series.

Voiced by: Keiji Fujiwara (motion comic). Ryota Takeuchi (anime) (Japanese); Robbie Daymond (English)