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An elite defense team under TLT command, they are responsible for the elimination of Space Beasts.
Portrayed by: Takuji Kawakubo
- "The reality one sees...if it were all a deception..."
- 10-Minute Retirement: In episode 16, he leaves the Night Raiders but returns at the end of the episode.
- Adorkable: Komon is a Nice Guy, but rather straight-laced. Also, there is his reaction when he gets tomato ketchup on his nose during a dinner in episode 30.
- Alliterative Name: Kaizuki Komon.
- Armor-Piercing Slap: Komon gets one from Nagi in episode 13. She was trying to snap him out of his grief for Riko's demise.
- Bad Liar: This is a given, as Komon is a naturally straightforward person. He lied to Ren's boss that he was Ren's cousin, something that Ren joked about upon hearing about it. Even Ren's co-worker remarked on how Komon used honorifics when referring to his 'uncle and aunt'.
- The Big Damn Kiss: Shares one with Riko in episode 10. Then, she dies 2 episodes later.
- Catapult Nightmare: Has one in episode 7 where Nagi shot him.
- Dark and Troubled Past: When he was a child he almost drowned. In episode 1, he is terrified and loses control of himself during a rescue operation taking place near a river.
- Friend to All Children: Komon goes out of his way to rescue a girl trapped in a factory with her dog in episode 7. He meets up with her in episode 8 and proceeds to have a chat with her, but the Memory Police had already erased the girl's memory.
- The Hero: Despite not being a Dunamist at first.
- Heroic B.S.O.D.: Goes through one as a result as a result of Riko's death in episode 12. It is only in episode 16 when he gets back to his normal self.
- Inner Monologue: As the main character, he has plenty of these.
- Instant Sedation: When he wakes up in the middle of his physical examination in episode 1, he is quickly sedated before he can ask more questions.
- It's All My Fault: For a while, he believed that Riko's death and a family being attacked by Nosferu in episode 12 happened because they cross paths with him.
- Lotus-Eater Machine: Mizorogi conjures up an illusion of the late Riko, making Komon think that he can reunite with her.
- Masculine Girl, Feminine Boy: Feminine Boy to Nagi's Masculine Girl.
- The Medic: Komon used to be in a rescue team, so he was able to patch up an injured Ren in episode 27.
- Naïve Newcomer: At first, because he is new to the fact that TLT and Space Beasts exist.
- New Meat: Night Raiders' newest member. The start of the series highlights his unfamiliarity with the ways of the Night Raiders and TLT.
- Nice Guy: Easily the best example in the show. He's straightforward, always willing to help others, bears no ill will towards anyone and is also quite empathetic.
- Parental Abandonment: His girlfriend Riko's family is shown a few times, but there is hardly any mention about Komon's parents. However, he was shown on the phone with his mother in episode 13 and she seemed to care about him.
- The Power of Hate: Nagi tries to get him to cultivate this. On the other hand, Himeya wants Komon not to give in to his hatred.
- Say My Name:
- Komon: Riko!
- Sensitive Guy and Manly Man: From his dialogue with Himeya in episode 15, he sees himself as the Sensitive Guy to Himeya's Manly Man.
- Komon: I'm not a strong man like you.
- Strapped to an Operating Table: In episode 1, when TLT perfoms a physical examination on him. When he wakes up in the middle of it, he is understandably upset and confused at the situation.
- Supporting Protagonist: Played straight, making Nexus the first show in the Ultra Series to use this trope. The story is told mainly from Komon's point of view, even though he is not a Dunamist (in other words, he does not transform into the titular hero).
- He loses his role as this when he eventually becomes the fifth Dunamist in the final episode.
- The Lost Lenore: His girlfriend, Riko. The fact that she was Dead All Along and was actually Dark Faust shook Komon considerably. Took him quite a while to get over that.
- This Is Unforgivable!:
- He is visibly angry with the Memory Police for erasing the memory of a girl he rescued in episode 8. The MP leader showed him why it was needed, which gave him second thoughts.
- This is clearly on his mind when Mizorogi taunts him about making Riko his People Puppet in episode 13.
- In episode 25, he says it out loud to Mizorogi after witnessing a defeated Ultraman.
- The Watson: Justified, as he is new to the Night Raiders and TLT.
- Wrong Genre Savvy: As a character, Komon would fit nicely in a typical Ultra Series, something which Nexus is not.
- He is fortunate enough to be the first person to encounter Ultraman. After being saved by him in episode 1, he firmly believes that Ultraman is on the side of good and is upset when the other Night Raiders, especially Nagi do not support his belief.
- In episode 3, he is surprised when Nagi revealed to him that Space Beasts attacks are covered up and that the victims' families do not know the truth of what really happened to their loved ones who are killed by Space Beasts.
- In episode 8, he is happy to meet up with a girl he rescued during an operation. He expected her to recognize him and to name her dog with the name his suggested, much like how a typical Ultra Series episode with a Victim of the Week would end. Instead, he finds that her memory has been erased.
Portrayed by: Yasue SatoThe deputy leader of the Night Raiders. She is very strict, especially to Komon and can be quite brutal in certain situations. She is driven to fight by her hate of Space Beasts, stemming from incidents regarding her childhood and her former lover Shinya Mizorogi.
- Action Girl: As the deputy leader of a Space Beast destroying team, this is a given.
- Armor-Piercing Slap: Gives one to Komon in episode 13 to snap him out of his grief for Riko's demise.
- Authority Equals Asskicking: The Deputy Captain of the Night Raiders. Her competence has been remarked upon by several characters.
- Badass: She is the Deputy Captain for a reason.
- Blood Knight: She lives to kill Space Beasts as a Night Raider. A similarity she shares with Mizorogi.
- Broken Ace: She is an excellent Night Raider, but past tragedies have taken a toll on her.
- Broken Bird: Her parents were killed and she was betrayed by her lover. Who can blame her for her cynical and harsh outlook on life?
- Broken Pedestal: To Mizorogi.
- Cannot Spit It Out: Nagi is rather tight-lipped when it comes to her past.
- Captain Smooth and Sergeant Rough: She is the Deputy Captain, but she has the Sergeant Rough role hands-down.
- The Chosen One: Eventually becomes the fourth Dunamist.
- Commander Contrarian: Stubbornly refuse to entertain the idea that Ultraman is not evil.
- The Cynic: Even though she has seen Ultraman destroy many Space Beasts, she explicitly express her distrust against them. This is one reason why she does not get along well with Komon.
- Dark and Troubled Past: The murder of her parents and seeing her former lover go to the dark side.
- Determinator: In her crusade against the Space Beasts.
- Fantastic Racism: Her mother's death at the hands of an inhuman being lead her to have a seething hatred of the Space Beasts and anything inhuman in general.
- Good Is Not Nice: Not the nicest girl around, but firmly on the side of good.
- In the Back: Shoots Mizorogi in episode 18. It did not kill him.
- It's Personal: When Mizorogi is involved.
- Jerk with a Heart of Gold: She is rather harsh with Komon, but she has shown genuine concern for him on certain occasions.
- Masculine Girl, Feminine Boy: Masculine Girl to Komon's Feminine Boy.
- Parental Abandonment
- The Power of Hate: Her immense hatred of Space Beasts is what drives her to take her job as a Night Raider very seriously. Revealed to have been invoked by Dark Zagi so that she would become a Dunamist.
- Selective Obliviousness: She is steadfast in her belief that Jun Himeya / Ultraman is an enemy, even though there is evidence to the contrary.
- The Smurfette Principle: Averted, as there is also Shiori Hiraki. Played straight in flashbacks, where she was the only woman in the team, the others being Captain Wakura, Ishibori and Deputy Captain Mizorogi.
- Sour Outside, Sad Inside
- This Is Unforgivable!: It's on her mind when it comes to the individual who murdered her mother.
- Tomboy and Girly Girl: Nagi is the tomboy, Shiori is the girly girl.
- Took a Level in Cynic: She was already distrusting of inhuman beings. Her former lover Mizorogi added fuel to the fire.
- Trigger Happy: Does not hesitate to use a gun against anything that she deems to be the enemy.
- Tritagonist: After Komon and the Dunamists.
- Missing Mom: When she was young, her mother was killed by a being resembling The One.
- The Unfettered
- Revenge: For her mother. It is also what drives her to be a ruthless Night Raider.
- Unfriendly Fire: Shoots at Ultraman upon her first time seeing him in episode 3.
- Unwitting Pawn: Revealed to have been one to Dark Zagi all along.
- You Killed My Mother
Portrayed by: Tamotsu IshibashiThe captain of the Night Raiders. He is a good leader and takes action effectively in any situation. He cares for his teammates and is well trusted by them. Although his motto is to follow orders, he will take necessary action if it means to protect others. He is a brother figure towards Komon who provides wisdom to the new recruit.
Portrayed by: Keiko GotoA female in the Night Raider team. Although she looks pretty and cute, she is an expert in weapons and can be very strong and helpful during missions. She has a good personal relationship with Mitsuhiko Ishibori.
Portrayed by: Kousei KatoThe tactician of the team and an expert in computers. He's actually Dark Zagi in disguise.
The Dunamists are humans capable of bonding with the light to become Ultraman Nexus using the Evolthruster.
Portrayed by: Tetsuya BesshoThe first Dunamist, a Lieutenant of the Japanese Air Force, first seen in Ultraman: The Next. While he never appears in the show, he's mentioned in various occasions.
Portrayed by: Yusuke KirishimaThe second Dunamist and the first one seen in the show. He is a serious, somewhat brooding individual, not given to trusting institutions such as the Night Raiders. He eventually befriends Komon, rescuing him from danger a few times. Himeya was a photojournalist, specializing in war photos. During one assignment, he was injured and subsequently treated by an orphan named Sera. Her death is one his main motivators throughout the show.
- Arch-Enemy: Dark Faust and later Dark Mephisto.
- Badass: As a Dunamist this is a given.
- Bad Dreams: Part of being a Shell-Shocked Veteran.
- Big Good: As Ultraman Nexus.
- Being Good Sucks: He risks his life to fight the Space Beasts, but TLT(except Komon) does not trust him and the general public is unaware of his heroic deeds. In episode 21, he is taken against his will by TLT as an experimental subject.
- Blessed with Suck: Believes his role as a Dunamist to be this.
- Camera Fiend: When he worked as a photojournalist.
- Catapult Nightmare: Has one in episode 5.
- The Chosen One: The second after Shunichi Maki.
- Death Seeker: As a Dunamist, he is willing to fight the Space Beasts even if it kills him.
- Determinator: As Ultraman, Himeya is determined to protect humanity from the Space Beasts.
- Deuteragonist: Being a Dunamist, he is the next important character on the show after Kaizuki Komon.
- Drowning My Sorrows: He fell into a drunken stupor upon returning from the war. His former colleague Sakuta helped him out, and he is now currently sober.
- Heroic Sacrifice: Performs one in episode 24 to destroy Dark Mephisto.
- Hot-Blooded: Sakuta described him as this in episode 6, when Himeya was a budding photojournalist.
- Hope Bringer: He becomes this to Komon, especially after the latter's girlfriend's death.
- Intergenerational Friendship: Forms one with Sera, a young girl who lost her family in the war and treated him when he was injured. He became a big brother figure to her.
- Irony: As noted by Sakuta, the war photos Himeya took earned international acclaim. Himeya was even nominated for a dream award overseas, but he was probably too psychologically scarred to appreciate all that.
- Leave Me Alone!: To his former colleagues, Negoro and Sakuta.
- Limited Wardrobe: He always going from place to place in the same black jacket and green shirt. Justified as he is currently unemployed and if his current living quarters environment is anything to go by.
- Offscreen Teleportation: Particularly noticeable in the first few episodes.
- Parental Substitute: For Sera, Himeya became a big brother figure.
- Perpetual Frowner: Not that he has much to smile about. He has mentioned that the only time he truly smiled was when he was with Sera.
- Precious Photo: Himeya still keeps photos of Sera in his home, going through them occasionally to remind himself of the good times he had with her.
- Sensitive Guy and Manly Man: From his dialogue with Himeya in episode 15, Komon sees himself as the Sensitive Guy to Himeya's Manly Man.
- Shell-Shocked Veteran: While being stationed in a war zone, he witnessed an orphan girl he befriended killed during armed combat. Himeya returned to Japan as a self-loathing wreck.
- Strapped to an Operating Table: During his capture by TLT in episode 21.
- Spider-Sense: After becoming a Dunamist, Himeya seems to have some form of ESP, able to sense where and when a Space Beast attacks, or if Komon is in danger.
- Survivor Guilt: Himeya never forgave himself for Sera's death during the war.
Portrayed by: Masato UchiyamaThe third Dunamist, Ren is outwardly, cheerful, optimistic and simple to the point of ditsy — this, however, conceals his past experiences. He receives the Light after Himeya's disappearance. Ren is a human created through genetic engineering under the flag of "Prometheus Project". However, Ren suffers from a genetic imbalance of his DNA which cuts his lifespan to only 17-18 years.
- Artificial Human: A 'child' of the Prometheus Project.
- Broken Hero: At first glance, would anyone think that this cheerful, carefree young man was actually a runaway test subject who does not have long to live?
- Dramatic Drop: Drops and breaks a cup when Mizuo mentions the word 'Raphael' to him in episode 30.
- For Happiness
- Friend to All Children: A distinctive trait.
- Good Is Not Soft
- Love at First Sight: With Mizuo.
- Nice Guy
- Stepford Smiler
- Your Days Are Numbered: A genetic imbalance in his DNA cuts his lifespan to only 17-18 years. A drug called 'Raphael' is his only hope of survival.
Ultraman Nexus/The Next/NoaA being of light from space, while in earth he lends his powers to the Deunamists to face the Space Beasts.
- Pocket Dimension: The Meta Field, a subspace created by Nexus to fight the Space Beasts without risk of civilian casualties or of being discovered. It puts considerable stress on the user's body after three minutes of continuous use.
Riko Saida / Dark Faust
Voiced by: Tetsu InadaThe first Dark Ultra to appear in the series.
- Antagonist Title: Debuts in Episode 07: Devil - Faust-.
- Arch-Enemy: To Jun Himeya / Ultraman.
- Arc Villain: From his debut until Mizorogi's appearance.
- Badass: Can put up a good fight with Ultraman.
- Badass Baritone: Courtesy of seiyuu Tetsu Inada.
- Black Eyes of Evil
- Blood Knight: Faust clearly enjoys fighting with Himeya.
- The Brute: Picks a fight with Ultraman at every chance he gets.
- Contralto of Danger: When in the form of Riko Saida.
- Dark Is Evil: Dark Faust.
- Disc One Final Boss
- Evil Counterpart: When Faust appears in episode 7, he describes himself as Himeya's shadow.
- Evil Laugh: To herald his debut in episode 7.
- Evil Sounds Deep: See Badass Baritone and Contralto of Danger.
- Immune to Bullets: Flicks away a bullet that Komon fires at him in episode 11.
- People Puppets: Riko Saida was his and by extension, Mizorogi's marionette.
- Pink Is Feminine: Faust's primary colors are pink and black. Riko Saida is his vessel.
- Pocket Dimension: His version of the Metafield, the Dark Field.
- Puny Earthlings: His speech to Komon in episode 11.Faust: Human, you have no right to make decisions. It's all futile. Accept fate and obey us.
- Sizeshifter: Faust can either appear in a human size form or the size of a Space Beast.
- That Man Is Dead: From episode 11.Faust: Riko? That name has already been erased.
- Villain Teleportation: A master.
- Worthy Opponent: Seems to consider Ultraman as one, judging by what he says during their battles.
Shinya Mizorogi/Dark Mephisto
Portrayed by: Mitsutoshi ShundoThe former deputy captain of the Night Raiders, who went missing in 2008 during a mission with Nagi, his former girlfriend. In reality, Mizorogi had merged with the Dark Giant known as Dark Mephisto.
- Ambition Is Evil: A Lust for power.
- Arc Villain: He did a lot of evil deeds that affected the cast until his defeat at the hands of Himeya and subsequent amnesia.
- Badass: A competent fighter whether in human form or as Dark Mephisto.
- Badass Normal: Before merging with Dark Mephisto, he was the Deputy Captain of the Night Raiders.
- Badass Longcoat: A black one.
- The Beastmaster: As Dark Mephisto, he is able to summon Space Beasts to do his bidding, such as Nosferu.
- Black Eyes of Evil: As Dark Mephisto.
- Blood Knight: Both him and Nagi Saijyo share common ground in hunting down and killing Space Beasts.
- Broken Pedestal: To Nagi, who looked up to him until he went to the dark side.
- The Corrupter: Tries to get Komon and Nagi to turn to the dark side.
- Died in Nagi Saijyo's Arms Tonight
- Dark Is Evil: Dark Mephisto.
- Disc One Final Boss: After the defeat of Dark Faust, he was the series' main antagonist until his defeat by Himeya.
- Drunk with Power: In episode 18, he describes merging with Dark Mephisto as a wonderful experience.
- Evil Feels Good: In episode 18, when he tells Nagi about his experience merging with Dark Mephisto, he gives off this vibe.
- Evil Former Friend:To Nagi. Heck, he was her lover.
- Evil Laugh: Rips an epic one in episode 24.
- Evil Wears Black
- Face–Heel Turn: Was a member of the Night Raiders intent on destroying Space Beasts until he encountered Dark Mephisto.
- Fatal Flaw: Lust. Deep down, Mizorogi desired power.
- First-Name Basis: With Nagi.
- For the Evulz: His 'games'.
- Handicapped Badass: Upon his reappearance in episode 29, it is revealed that he had lost his powers after his battle with Himeya in episode 24.
- Implacable Man
- It Amused Me: In episode 13, he states that it was fun watching Komon having a relationship with Dead All Along Riko.
- Jerkass: He seems to delight in playing cruel mind games with other people, as well as tormenting Nagi, his former lover.
- Lack of Empathy
- Laser-Guided Amnesia: Experiences memory loss after the events of episode 24.
- Loss of Identity: As of episode 29.
- Manipulative Bastard: Seeks out people to psychologically torment.
- Might Makes Right: Dark Mephisto uses this point to convince Mizorogi to merge with him during a flashback in episode 18. See also Social Darwinist.
- My God, What Have I Done?: The amnesiac Mizorogi is extremely distraught when Director Matsunaga tells him of all the evil things he did before his Laser-Guided Amnesia.
- Not Quite Dead: A few times.
- Pride: After gaining his powers, Mizorogi believes himself to be a superior being.
- Redemption Equals Death: Sacrifices himself so that Dark Mephisto Zwei could be destroyed.
- Sadist: Hurts and toy with people for his own amusement.
- Start of Darkness: Upon merging with Dark Mephisto.
- Strike Me Down with All of Your Hatred: Invokes this in episode 13 by telling Komon straight to his face that the latter and his girlfriend's troubles was his doing.
- The Social Darwinist: One of the points brought up by Dark Mephisto during a flashback in episode 18 which led to them merging.Dark Mephisto: All that matters is that the strong survive.
- This Cannot Be!: In episode 24, when Himeya's Heroic Willpower kicks in.Mizorogi(as Dark Mephisto): Impossible! I perfectly calculated your limit!
- Tragic Hero: An excellent Night Raider who turned evil and ultimately lost everything, including his memories because of a deep seated desire for power.
- Transhuman: Upon merging with Dark Mephisto.
- Villain Teleportation
- What You Are in the Dark: A flashback in episode 18 showed Dark Mephisto pointing out to Mizorogi that deep down he enjoyed destroying Space Beasts.
- We Can Rule Together: To Nagi, whom he view as the only person on an equal level with him and thus frequently ask her to join him in the dark side.
- Would Hit a Girl: Or rather shoot. He killed Riko Saida in cold blood.
- Would Hurt a Child: Had Nosferu attack a family with two children.
Hiroyuki Misawa / Dark Mephisto Zwei
Mitsuhiko Ishibori/ Dark Zagi
The various monsters that Nexus and Night Raiders battle throughout the series.
- First Appearance: Ultraman: The Next
- The Assimilator: Can absorb other beings to gain their powers and traits like birds for wings.
- Eldritch Abomination: An extraterrestrial being who can posses people and absorb other life forms to evolve further.
- Evil Counterpart: To Ultraman Nexus in Ultraman: The Next as both require human hosts, but The One's host loses their humanity over time.
- Expy: His final form is based on Bemular, the very first monster in the original Ultraman.
- Mythology Gag: A monster based on Ultraman's very first opponent as the first villain for an attempted franchise reboot!
- One-Winged Angel: As The One absorbs various animals into itself, it grows more and more monstrous.
- Super-Powered Alter Ego: As an Evil Counterpart to Ultraman Nexus, this is a given.
- Voluntary Shapeshifting: Can transform between his human host and true form at will unlike Ultraman Nexus.
- First Appearance: Night Raid
- Asteroids Monster: Played straight and reversed as Pedoleon is a mass of small monsters that can split and merge into giant form as needed.
- Blob Monster: A slug-like creature capable of turning into liquid and merging into a kaiju form.
- Combat Tentacles: In giant form.
- Expy: As a Blob Monster that feeds on ethanol, has a flight form, and can split, the similarities to Hedorah are not hard to notice.
- Gratuitous German: In each form, its name is Pedoleon ___ with a German word fitting the form. "Kleine" in its base form, "Groß" when kaiju-sized, and "Fliegen" in flight form.
- It Can Think: When Night Raiders begins to hunt down the Pedoleons, they discover that the monsters are changing tactics to gain an advantage over Night Raiders, including holding humans hostage and merging themselves into giant form.
- Overly Long Tongue: Used for snatching unlucky humans and eating them in its small form.
- Starter Villain: For Komon, as it's the first Space Beast he encounters.
- First Appearance: Dunamist
- Beware My Stinger Tail: Has a large pincer on its tail.
- Big Creepy-Crawlies: Resembles an oversized mix of a locust, a cockroach, and a cicada.
- Combat Tentacles: When it burrowed underground, it would use tentacles to snatch victims from below.
- Giant Flyer: It's first appearance, where it snatches cars straight out of desolate highways.
- Tunnel King: After escaping the Night Raiders the first time, it spends the rest of its story arc underground.
- First Appearance: Relic
- Breakout Villain: As the Nexus monster with the most reappearances in the franchise, Galberos is definitely this for the Space Beasts.
- Breath Weapon: Fireballs.
- Early-Bird Cameo: First appears in a flashback in "Relic" before appearing properly in Episode 17 "Darkness".
- Hellhound: Carries strong motifs of Cerberus.
- Instant Awesome, Just Add Dragons: Its main head is that of an eyeless dragon.
- Master of Illusion: Can hypnotize opponents with its wolf heads into seeing illusions of itself. In Ultra Galaxy NEO, Alien Nackle uses it to torment Rei's Gomora with illusions of Zetton.
- Mix-and-Match Critters: A dragon mixed with a wolf.
- Multiple Head Case: Three heads - one of a dragon, and two of wolves.
- Ninja Zombie Pirate Robot: A three-headed wolf-dragon that can create illusions!
- Savage Wolves: Two wolf like heads on its shoulders.
- Villain Team-Up: With Mega Flash in "Revolt". Later with Alien Nackle in Ultra Galaxy NEO and Bemstar, Gan Q, and Red King in Ultra Zero Fight under command of Alien Bat.
- First Appearance: Warning
- Breath Weapon: A blast of burning pollen.
- Man-Eating Plant: Being a Space Beast, the man-eating comes naturally.
- Meaningful Name: Named after the Rafflesia flower.
- No Body Left Behind: Victims of its burning pollen are turned into piles of ash, though their clothes are left in their original condition.
- Plant Aliens: A flower-like Space Beast.
- First Appearance: Marionette
- Achilles' Heel: Its mouth as that's where its regeneration organ lies
- From a Single Cell: The Night Raiders get a lot of trouble from Nosferu because of this.
- Meaningful Name: After the famous cinema vampire.
- Necromancer: Can revive the corpses of those it kills to act as servants to search for food.
- Nightmare Face: A hideous mix of a naked mole-rat and a termite.
- Overly Long Tongue: Can be used as a whip or a harpoon on unlucky humans.
- Pet Monstrosity: To Dark Mephisto.
- Punny Name: Nosferatu.
- Rodents of Unusual Size: A giant rat Space Beast.
- Wolverine Claws: Viciously long claws, which it uses to kill Dark Faust.
- Your Size May Vary: Depending on the episode, Nosferu was either kaiju-sized or slightly taller than a human. Justified as when it regenerates, it must eat ravenously to grow in size whenever it regenerates.
- First Appearance: Apocalypse
- Bears Are Bad News: Has the body of a bear.
- Big Creepy-Crawlies With the head, hands, and feet of an ant.
- Mix-and-Match Critters: Resembles an ant-bear hybrid.
- Overly Long Tongue: Uses it to snatch victims.
- We Hardly Knew Ye: Only two appear in a flashback.
- First Appearance: Apocalypse
- Breath Weapon: Green fireballs.
- We Hardly Knew Ye: Only appeared very briefly in a flashback in Nexus. His reappearance in Ultra Galaxy Mega Monster Battle was equally brief.
- Your Size May Vary: In Mega Monster Battle, Frogos' sized is boosted from 10 meters to 40 meters. Justified as the majority of Ultra monsters are around that size or larger, so the producers needed to equal the odds for Frogos.
- First Appearance: Cross Phase Trap
- Barrier Warrior: Can create a small shield in front of itself.
- Breath Weapon: Fireballs from its Nested Mouths.
- Invisibility: Can phase in and out of our world to effectively do this.
- Nested Mouths: At the very tip of its Overly Long Tongue - perfect for eating humans.
- Overly Long Tongue: About the length of its body!
- Power Crystal: Several on its back that act as the source of its phasing powers. They can be destroyed, but will regenerate given time.
- Rock Monster: A big, quadrupedal one. Funny enough, the suit would later be used to make another quadruped rock monster - Gromite from Ultraman Mebius
- First Appearance: Cure
- Body Horror: An asymmetrical mass of tentacles and tormented faces on legs
- Breath Weapon: Explosive black smoke from its main face.
- Combat Tentacles: Numerous, which it uses to snag victims from our world and drag them into the Land of the Dead.
- Dimension Lord: Of the Land of the Dead, which it can open small portals to for snatching prey.
- Eldritch Abomination: A Dimension Lord resembling a shambling mass of tormented faces. Definetely.
- Nightmare Face: Numerous in resemblance of The Scream.
- Overly Long Tongue: Several of its faces have these which act as tentacles.
- First Appearance: Prophecy
- Beware My Stinger Tail: Not actually used for stinging, but can be used to shoot energy beams.
- Giant Enemy Crab: Has crustacean features too.
- Scary Scorpions: Complete with stinger tail.
- Starter Villain: For Ren's career as Ultraman Nexus.
- First Appearance: Calling
- Breath Weapon: Webbing, of course, since its a spider Space Beast.
- Dirty Coward: Prefers to attack humans from the cover of its fog.
- Giant Spider: The biggest one in the franchise.
- Laser-Guided Amnesia: Can erase memories of its existence with a flash of its eyes on survivors.
- Make Me Wanna Shout: A sonic screech.
- Multi-Armed and Dangerous: Being a Giant Spider, it has four of them.
- One-Shot Character: Although Banpira reappeared in Ultra Galaxy Mega Monster Battle, it is the only Monster of the Week, asides Izmael, to only appear in a single episode of Ultraman Nexus.
- Ominous Fog: Has an organ above its head that allows it to create such for attacks.
- Villain Decay: In Ultra Galaxy Mega Monster Battle, Banpira is one of the show's weakest kaiju, standing absolutely no chance against Rei's Gomora. It doesn't even use any of its powers!
- First Appearance: The Watcher
- Belly Mouth: As Lizarias Golar.
- Breath Weapon An energy beam.
- Came Back Strong: Far stronger as Lizarias Golar.
- Everything's Better with Dinosaurs: The only dinosaur-based monster in Nexus.
- From a Single Cell A single scale actually, which allows it to reform into Lizarias Golar.
- First Appearance: A.D. 2004
- Combat Tentacles: A weird variant as Mega Flash creates tentacles out of energy to snatch victims.
- Flying Seafood Special: Something akin to a giant mix of a sea hare and a nautilus
- Knight of Cerebus: The first Space Beast to attack a civilized region, making him one for TLT
- Shock and Awe: Can shoot lightning bolts from its body.
- Villain Team-Up: With Galberos
- First Appearance: Farewell
- Beware My Stinger Tail: Borrowed from Grantella.
- Breath Weapon: From Lizarias.
- Combat Tentacles: From Kutuura as well as Golgolem's tongue
- Disc One Final Boss: You'd think that a chimera of all the previous Space Beasts would be the final villain as per a typical Ultra Series entry, but nope!
- Mix-and-Match Critters/Hybrid Monster: In the vein of monsters like Jumbo King and Giga Chimera, Esmael is a walking mass of the various body parts of previous monsters.
- Multiple Head Case: Essentially it's covered in the heads of all the previous Space Beasts, though only Lizarias' head is active.
- Shock and Awe: Borrowed from Mega Flash.
- Spell My Name with an "S": Ezmael is also used.
Bugbuzun Golar and Bugbuzun Brood
- First Appearance: Ultraman Nexus EX
- Big Creepy-Crawlies: As per the original Bugbuzun.
- Breath Weapon: The Broods breathe confusion gas.
- Combat Tentacles: Used by the Golar in the same way as the normal Bugbuzun.
- Make My Monster Grow: The human-sized Bugbuzun Brood always gets turned giant-sized whenever it appears.
- Mook Maker: Bugbuzun Golar creates Bugbuzun Broods to search for human prey. The Broods eat the humans and go back to their mother who eats them! Frighteningly, only the Bugbuzun Broods are seen when they return in Ultraman X, suggesting the Golar is still out there...
- Tunnel King: The Golar hides underground while the Broods do the dirty work.
Illustrator / Yu Kirasawa
Portrayed by: Nobuhiko Tanaka
- "Member Komon...Are you surprised that this young man is your superior?"
- Artificial Human: Just like Ren, he was also created via the Prometheus Project.
- Everyone Calls Him Illustrator
- Komon: "Illustrator?"Ishibori: "I don't know the reason, but everyone calls him that."
- Hacker Cave: Where the real him is located.
- Man in White: Always dressed in white when on the job. He is always on the job.
- The Spock: His proposed strategies when it comes to combating Space Beasts suggests he is this.
- The Strategist: He is usually in charge of coordinating the Night Raiders' operations against the Space Beasts.
Portrayed by: Horiuchi Masami
- "Pronounced "Tilt". Our establishment goes above the nations."
- Benevolent Boss
- Jumping Off the Slippery Slope: When he had Himeya kidnapped and analyzed in episode 21.
- The Lost Lenore: Having lost his wife during the events of 2004, he seeks to understand more about the Light, Ultramen and the Dunamists in order to defeat the Space Beasts.
- Mr. Exposition: Provides basic info about TLT to Komon. Justified, as Komon is New Meat.
- Sharp-Dressed Man: As the director of TLT, he dons a black suit.
- Stoic Spectacles: He is usually quite calm and composed.
Portrayed by: Shion Nakamaru
- "I... believed in you. Komon-kun, I know you would be able to protect everyone."
- Dead All Along: She was murdered by Mizorogi in 2008, the same day she first met Komon. She was then revived to serve as the human host for Dark Faust.
- Died in Kazuki Komon's Arms Tonight: After Dark Faust is defeated.
- Killed Off for Real: One of the first characters to die in the show, a clear indication of what Nexus is.
- People Puppet: Riko is being controlled by Dark Faust against her will.
- Sanity Slippage: When she starts to recall memories of her death.
- Taking the Bullet: Wills herself to take a blow from Nosferu to protect Komon as Dark Faust in episode 12. It ends in Dark Faust's defeat and her death.
- Too Happy to Live: Riko was a cheerful artist from a loving family who had just met a Nice Guy that would become her boyfriend. Then, Mizorogi, Nosferu and Dark Faust came along...
- Nature Lover: Spends most of her time at the zoo sketching drawings of animals.
- Nice Girl: Her interactions with Komon and her family proves this.
- Walking Spoiler: We know little about her other than she is an artist who is Komon's girlfriend and she wants him to meet with her family soon. When the truth about her comes to light, everything changes.
Portrayed by: Hiroshi OkouchiA journalist who has known Himeya for a long time. Negoro believes that something big and mysterious is happening, but is being covered up by the authorities and sets out to uncover the truth.
- The Alcoholic: Negoro is always seen drinking canned beer. Oddly, he has never appeared drunk on-screen.
- Blind Alley: How he shakes off the Memory Police in episode 21.
- Camera Fiend: Comes with being a journalist.
- Conspiracy Theorist
- Follow That Car: After he sees Himeya boarding a cab in episode 5, Negoro hails another cab and orders him to follow Himeya. He fails to catch Himeya though.
- Jerkass: In his quest to expose the truth, Negoro does some pretty unethical stuff, such as:
- Stalking Jun Himeya. He even enters Himeya's home without the latter's permission in episode 6.
- Trying to trick Komon into revealing classified information in episode 16.
- Stealing a memory card from a dead photographer's co-worker and publishing the photos as his own in episode 20.
- Plagiarism: Steals a memory card containing photos of Night Raiders fighting a Space Beast and has it published under his name.
Megumi SakutaA young woman who works at a newspaper office. Himeya was her co-worker.
- Boyish Short Hair
- Nice Girl: Friendly, polite, helpful and genuinely concerned about Himeya, especially after he came back from the war.