- Played by: Kenji Sahara
- Ace Pilot: He does get to show off his aviation skills on occasion.
- Dub Name Change: Known as Jim in the dub.
- Played by: Hiroko Sakurai
- Intrepid Reporter: Tends to get herself involved in the Monster of the Week stories because of this.
- Played by: Yasuhiko Saijou
- Dub Name Change: In the dub, he's instead referred to by the nickname of Happy.
- Plucky Comic Relief: He's much more comedic in nature than the other characters, especially for a Sci-Fi Horror series.
- Played by: Ureo Egawa
- First Appearance: Defeat Gomess!
Gomess' highly privileged status as the first of many monsters in the Ultra Series to come has earned it a number of reappearances in other series battling Ultra heroes.
- Archenemy: Of Litra, as the two are destined to battle each other.
- Badass Normal: Gomess may not have any flashy powers like many later Ultra monsters, but that doesn't stop him from being able to stand toe on toe with many other Ultra monsters and heroes.
- Breakout Villain: The very special title of being the first of many, many monsters has made Gomess into a popular choice for TsuPro when they want to recycle kaiju, meaning Gomess has faced Ultramen several times.
- Everything's Better with Dinosaurs: He strongly resembles one, although according to the Ultra Galaxy Mega Monster Battle kaiju files, he's actually a mammal.
- Mighty Glacier: In contrast with the small and swift Litra.
- Not Zilla: Well, he is created from a repurposed Godzilla suit (specifically the one used in Mothra vs. Godzilla).
- Prehistoric Monster: Gomess had been slumbering beneath the earth for millions of years, reawakening when awoken by careless miners.
- Tail Slap: Tends to use his tail in battle.
- Tunnel King: A powerful burrower and likes to hide beneath the earth until disturbed.
- First Appearance: Defeat Gomess!
Litra would later play a major role in Ultra Galaxy Mega Monster Battle as one of the main heroic monsters in that series, albeit brought to life entirely with CGI instead. But that has been the bird's only reappearance so far.
- Archenemy: Of Gomess, whom she is prophesied to battle to the death in ancient legend.
- Benevolent Monsters: Unlike the violent and brutish Gomess, Litra is a peaceful and benevolent monster that seeks to protect humans from Gomess' rampage.
- Breakout Character: While she doesn't reappear as often as Gomess, Litra proved popular enough that she reappeared as one of the main heroic kaiju of Ultra Galaxy Mega Monster Battle, complete with fighting alongside Ultraman, Ultraseven, Ultraman Mebius, and Gomora in Mega Monster Battle: Ultra Galaxy Legends
- Breath Weapon: She breathes fire, but can also spit stream of acid called the Citronella Beam at the cost of her own life.
- Cast From Hitpoints: Her Citronella Beam costs her own life to use, so she only saves it for the most desperate situations.
- Fragile Speedster: In contrast with the hulking and brutish Gomess.
- Gentle Giant: Once again, Lita is a completely peaceful creature that opposes any violent and destructive monsters that attack humanity.
- Giant Flyer: She's not as gigantic as most other Ultra monsters, but Litra is still a really big bird by anyone's standards.
- Heroic Sacrifice: Dies after using her Citronella Acid to kill Gomess.
- The Phoenix: Modelled after the phoenix, though with heavy amount of peacock thrown in for a good measure.
- First Appearance: Goro and Goroh
- Berserk Button: Goro is a perfectly peaceful creature so long as you don't hurt his human friend.
- Everything's Better with Monkeys: A gigantic monkey who befriends an ordinary man.
- Mischief-Making Monkey: Although now standing 50 meters tall, Goro still gets into the same kinds of shenanigans that normal-sized monkeys get into.
- Non-Malicious Monster: Goro is mainly a peaceful kaiju who normally only causes a lot havoc with its size and mischievousness.
- Trademark Favorite Food: He loves milk and ends up causing a lot of trouble as he starts taking milk delivery trucks and guzzling them clean. The JSDF even employs a giant canister of tranquilizer-laced milk to try stop the monster.
- First Appearance: The Gift from Space
- Eye Beams: Namegon can shoot lasers that can kill a man on contact, but lack explosive force.
- Meaningful Name: Derived from "Namekuji", which is Japanese for "slug".
- Weaksauce Weakness: The first Namegon is killed when it falls into the ocean, dissolving from the salt in the water.
- First Appearance: Mammoth Flower
- Foul Flower: It's a gigantic flower with bloodsucking vines.
- Monumental Damage: Juran's roots smash through numerous buildings around Tokyo, including the Imperial Palace.
- No Name Given: It was only known as the Mammoth Flower in its appearance, only being named in supplementary sources later on.
- Poisonous Person: Juran can spray poisonous pollen from its center everywhere.
- First Appearance: Peguila is Here!
Peguila has made various small cameos in other series since then, but is more notable for being the first Ultra monster to make a reappearance, as it returns in the show's fourteenth episode "Tokyo Ice Age".
- An Ice Person: Its subtitle is "Freezing Monster".
- Breakout Villain: Sort of. Peguila is considered to be one of the most iconic Ultra Q kaiju, but he's only ever appeared in tiny cameos in other series and has never battled any Ultramen.
- Breath Weapon: Peguila can breathe freezing mist capable of turning Tokyo into ice.
- Giant Flyer: Soars all the way from Antarctica to Japan.
- Kryptonite Factor: Peguila's only weakness is Pegimin H, a chemical that exists in only a certain species of polar moss.
- Mix-and-Match Critters: Peguila's design is meant to be a hybrid of a walrus and a bat.
- Smoke Out: Can produce a black smoke from its body that allows it to flee without being spotted if needed.
- First Appearance: Grow Up, Little Turtle!
- Expy: The year before Ultra Q debuted, Japan had created another giant flying "Gamer-" turtle...
- Intangibility: Gameron can phase through walls at will, granting the ability to anyone riding it as well.
- Turtle Power: Based on the turtle from the Japanese folktaleUrashima Taro who brought the eponymous fisherman to see Ryujin at the bottom of the sea.
- First Appearance: Grow Up, Little Turtle!
- Breath Weapon: Breathes fire.
- Giant Space Flea from Nowhere: The whole episode is rather bizarre, but the Kai Dragon brings things up a notch as Oto-hime creates it from a rocket she rides to fight Gameron, only to vanish after the fight finishes a few minutes later.
- Our Dragons Are Different: Like Manda, the Kai Dragon is based on traditional Japanese dragons.
- We Hardly Knew Ye: Only appears for one very quick scene where it kills Gameron and then vanishes once the deed is done.
- First Appearance: Grow Up, Little Turtle!
- Reality Warper: She's shown doing things like summoning a swing, teleporting Taro onto sad swing, and turning a rocket into the Kai Dragon. Justified as it was All Just a Dream from Taro.
- The Trickster: She mainly just uses her powers to annoy Taro and make havoc with him, yet also rescuing him when he almost drowns and fixing his clothes when the Kai Dragon burns them.
- First Appearance: S.O.S. Mount Fuji
- Achilles' Heel: Gorgos' life is powered by a glowing core inside its body. If the core is somehow extracted from the monster or destroyed, Gorgos dies.
- Breath Weapon: Can breathe superheated steam.
- No Name Given: In his debut appearance, he's only called the Rock Monster. "Gorgos" was only created much later.
- Pulling Themselves Together: Construction workers initially encounter it in the form of a boulder on a road, so they dynamite it. However, Gorgos' core regathers the pieces to recreate Gorgos.
- Rock Monster: Gorgos came to Earth from a meteorite that crashlanded at Mt. Fuji.
- First Appearance: Terror of the Sweet Honey
- Kill It with Fire: The JSDF finishes off Mongler by dynamiting a volcano to create an eruption that engulfs the giant mole in lava (done via Stock Footage from Rodan).
- Spell My Name with an "S": Also called Mongular.
- Tunnel King: Since Mongler is just a giant mole, the JSDF spends a good amount of time trying to figure out how to lure the monster to the surface.
- First Appearance: Spider Baron
- Giant Spider: It is left vague whether the two Baron Tarantulas are a pair of abnormally large spiders collected from a remote part of the world by the scientist or the reincarnated forms of the scientist and daughter who allegedly haunt the mansion.
- Haunted House: The Baron Tarantulas' lair is a classic western-style mansion located in a swamp. Naturally, Jun and company have to spend the night there.
- First Appearance: The Underground Super Express Goes West
- Blob Monster: Its normal state is a mass of cellular jelly, but when it escapes from containment, M1 rapidly evolves into a gorilla-like creature.
- Non-Malicious Monster: Although M1 is a peaceful creature, he causes a lot of havoc on the train with his presence s it terrifies passengers and crew and also messes with the train's controls.
- First Appearance: Balloonga
- Energy Absorption: Feeds on any form of energy (such as electricity, but it even consumes energy produced by missile and a typhoon), allowing it to rapidly expand, and theoretically, it can do this ad infinitum.
- Living Gasbag: Its a rapidly expanding balloon-like monster from Saturn that ends up on Earth when it latches on to a rocket returning from the ringed planet.
- Meaningful Name: Its a Living Gasbag named Balloonga.
- First Appearance: I Saw a Bird
- Big Eater: The first evidence of its existence is when all the animals at a zoo go missing and the injured zookeeper says "I saw a bird".
- Meaningful Name: Larugeus' name is mutation of "large", which is what the bird can make itself.
- Prehistoric Monster: Professor Ichinotani explains that Larugeus' species has been extinct since the Ice Age.
- Sizeshifter: Larugeus' normal form is only the size of a finch, but it can make itself as tall as 50 meters if it is hungry or enraged. However this fact is not revealed to either the audience or the cast until the end of the story.
- First Appearance: Garadama
Garamon is considered to be a very iconic monster and has been homaged in other entries of the Ultra Series like Ultra Q Dark Fantasy. However, it has not made any reappearances, which is likely due to how the costume was repurposed as the equally iconic but friendly Pigmon.
- Applied Phlebotinum: The Gilsonite meteor, dubbed "Garadama" by the characters. The rock acts as Garamon's brain and programs the robot monster to do as the aliens behind it desire. Destroying the meteorite kills Garamon.
- Breakout Villain: Like Peguila, Garamon is a highly iconic Ultra Q kaiju, but don't expect him to make any appearances due to his identical resemblance to Pigmon (the only physical difference is their size).
- Cicadian Rhythm: Makes these noises as it walks, which acts as a subtle hint of the identity of its creators.
- Came from the Sky: They always arrive on Earth in the form of meteors.
- Humongous Mecha: Although he doesn't look like a robot, Garamon is in fact a mechanical monster created by the Cicada People to invade Earth.
- First Appearance: Kanegon's Cocoon
Despite having only a few homages and cameos in other installments of the franchise, Kanegon is one of the most popular and iconic monsters in the Ultra Series, and thus frequently appears in merchandise and promotional material related to the series.
- Bilingual Bonus: "Kane" is Japanese for "money"!
- Breakout Character: Even though Kanegon barely ever reappears in the Ultra Series, he's up there with the likes of Baltan, Red King, Gomora, and Zetton as among the most recognizable and iconic Ultra monsters in Japan.
- Non-Malicious Monster: In his desperate search for cash to satisfy his appetite, Kanegon causes a lot of havoc as he scares people, but otherwise has no ill intentions.
- Was Once a Man: Kanegon is the result of a kid becoming transformed by a magical, money-making cocoon when he tried to find the source of the coins inside it.
- First Appearance: Garamon Strikes Back
- Breakout Villain: The Cicada People tend to appear a fair bit due to their association with Garamon and Baltan. However, the one from Ultra Q is the only male who has ever appeared onscreen, with all subsequent ones being female.
- Insectoid Aliens: He's from a species of humanoid cicadas native to Planet Q. Incidentally, his species are related to the Ultra series most famous insectoid aliens, the Baltans.
- The Man Behind the Man: His species had sent Garamon to attack Earth in the monster's first appearance, but they don't physically appear until the aliens decide to send two more Garamons to attack.
- Mind over Matter: His weapon of choice is a telekinetic remote control, which he uses to snatch the firearms right from the cops' hands and shoot them with their own guns.
- You Have Failed Me: His species send a flying saucer to disintegrate him after the Garamons are killed.
- First Appearance: The 1/8 Project
- Incredible Shrinking Man: In a plot remarkably reminiscent of Downsizing (made 51 years later), Yuriko learns of a project by the Japanese government to increase urban living space by miniaturizing humans to an eighth of their size. It turns out to be All Just a Dream though.
- First Appearance: The Rainbow's Egg
- Breath Weapon: Pagos has atomic breath.
- Eat Dirt, Cheap: Pagos feeds on uranium and spends much of the episode pursuing a uranium capsule dubbed "the Rainbow's Egg".
- Everything's Better with Dinosaurs: Especially if they're subterranean, uranium-eating dinosaurs!
- I Love Nuclear Power: His uranium diet has granted him atomic powers.
- Taken for Granite: The JSDF destroys Pagos by turning it to stone through chemical missies, causing the monster to shatter afterwards.
- Tunnel King: Like Baragon whom he's based on, Pagos is primarily a burrowing monster.
- First Appearance: Challenge from the Year 2020
Kemur has proven to be a very popular alien and, like Gomess, had made several reappearances in the Ultra Series where he gets to battle Ultra heroes.
- Achilles' Heel: X-Channel Light Rays are harmful to Kemur-Man.
- Alien Abduction: His goal is to abduct humans and bring them back to the future to sustain his life force. Instead of a flying saucer though, he's using Weaponized Teleportation.
- Breakout Villain: Kemur-Man is considered to be among Ultra Q's most iconic monsters due to the eerie nature of his appearance and debut episode. Since he also possesses the ability to change size, he has also battled a few Ultramen, such as Ultraman Ginga.
- Life Imitates Art: In-Universe example. In the episode, Ippei notes that Kemur-Man's story as reported is exactly the same as a science fiction novel called Challenge from the Year 2020, which also deals with an alien that goes to the past to capture humans using teleportation slime as a weapon. Following the novel also allows the characters to discover its weakness.
- Super Speed: In one iconic scene, Kemur-Man outruns a pursuing police car with this ability.
- Weaponized Teleportation: Kemur's most infamous ability is to spray a purple goop from its antennae that teleports victims to a pocket dimension
- First Appearance: The Undersea Humanoid Ragon
Ragon is one of the most iconic monsters in Ultra Q and has reappeared in several more Ultra Series, most notably the original Ultraman, making it the first Ultra monster to reappear in a different series.
- Breakout Villain: Ragon is one of the most well-known monsters in the show and ended up becoming the first monster to reappear in another series when a male mutated into a giant by an atomic bomb battled the original Ultraman.
- Fish People: The resemblance to the Creature from the Black Lagoon has been noted by western fans.
- Monster Is a Mommy: The Ragon had been attacking the village because the item that the fishermen had discovered was actually the monster's egg.
- Music Soothes the Savage Beast: An enraged Ragon is always calmed down by music, with the individual running amok in the fishing village being briefly distracted by a transistor radio when it attacks the characters.
- Non-Mammalian Mammaries: Despite being Fish People, the female has visible breasts.
- Our Mermaids Are Different: The Ragons were known in the legends of the Iwanejima fishermen as a race of reclusive half-fish, half-human creatures from the bottom of the sea.
- First Appearance: Space Directive M774
- Giant Flyer: As a manta ray kaiju, it can both fly and swim.
- Sea Monster: The Keels landed Bostang in the ocean and let the creature go about attacking ships as it pleased.
- First Appearance: Space Directive M774
- Archenemy: Of the Alien Ruperts, whose homeworld they had devastated in a previous conquest.
- Invisible Aliens: Until Ultra Galaxy Mega Monster Battle NEO, they never made a physical appearance.
- Human Aliens: Revealed to be such in Ultra Galaxy. Even then, they usually prefer to wear concealing helmets that make them appear more alien.
- The Man Behind the Man: They are directing Bostang to attack ships on Earth as part of their galactic conquest, as Zemi explains.
Alien Ruperts Zemi
- First Appearance: Space Directive M774
- Aliens Among Us: As she reveals at the end of the episode.
- Human Aliens: Although she only ever appears in a human-like form, she states that it is merely a disguise. She also claims at the end of the episode that others of her kind live amongst humanity in similar form.
- First Appearance: MetamorphosisPlayed by: Kozo Nomura
- Brainwashed and Crazy: Being infected by the powder of the Morpho Butterflies has turned Kohji into a mindless, hulking brute with no memory of his former life. He gets better.
- First Appearance: Metamorphosis
- Big Creepy-Crawlies: While not as gigantic as many later insects, a butterfly with a 2 meter wingspan is nothing to sneeze at.
- Butterfly of Transformation: Literally. These are butterflies that turn other creatures into giant monsters.
- Punny Name: "Morpho" is a play on their ability to morph other creatures into giants, as well as a genus of butterflies from South America.
- First Appearance: Fury of the South Sea
- Giant Squid: Octopus actually, but a cephalopod with a 100-meter body and 200-meter tentacles is still nothing to be sneezed at.
- Sea Monster: The natives of Compass Island are terrified of Sudar and try to appease it with sacrifices of those who break their laws, as well as suspicious foreigners.
- First Appearance: The Idol of Goga
- Eye Beams: Can fire disintegration rays from its eyestalks, even when sealed inside its statue.
- Kill It with Fire: How the JSDF destroys it.
- Sealed Evil in a Can: After devastating Aranka six thousand years ago, Goga was somehow shrunken and imprisoned inside a statue by the Arankans. However, the statue is also cursed to release Goga if it is ever desecrated. Then some thieves steal it from its museum display...
- This Is a Drill: The monster's shell can act as a backwards-facing drill.
- First Appearance: The Devil ChildPlayed by: Noriko Sakabe
- Astral Projection: Lily is just an ordinary little girl, but after being used as a volunteer for Akanuma's spirit-body separation trick, she ends up with the ability to separate into a good physical form and evil spirit form every night when the magician's trick proves to be less temporary than anticipated.
- Creepy Child: The evil half of Lily, complete with an eerie laugh.
- Evil Laugh: Lily's evil side has one. It's that of the Matango modified to sound like a little girl.
- Evil Twin: Lily's spirit. She even tries to lure her good twin into getting hit by a train!
- First Appearance: Blazing Victory
- Combat Clairvoyance: Peter possesses the ability to predict the future and communicate it to his owner, which Dynamite Joe keeps a secret from the public. But when Peter predicts that he will lose the world championship, Joe goes into hiding.
- Sizeshifter: Variation. Peter is normally the size of a normal lizard, but can only maintain his size if in water. On land, his size increases to that of a human, and when exposed to intense heat, he can reach a height of 30 meters.
- First Appearance: The Disappearance of Flight 206
- Phantom Zone: Todola's primary power is to create a cloud-like vortex that engulfs airplanes and transports them to its world, an endless zone of mist-covered ground full of ruined planes.
- Wily Walrus: In this case, one from a pocket dimension that captures planes for it to attack.
Train of the Vary Dimension
- First Appearance: Open Up!
- Cool Train: Modelled after the Odakyu 3100 Electric Train.
- Not-So-Imaginary Friend: As the characters discover, the story of the Vary Dimension and its train were originally written by a science fiction writer named Kenji Tomono. When the cast investigate, they discover his last writing: a letter saying he has taken the train...