Jin HaibaraThe main Protagonist, a counselor and investigator of the strange.
- Contrasting Sequel Protagonist: Unlike the protagonists of either of the previous Ultra Q series, Jin is a counselor instead of a reporter and actively seeks out oddities instead of encountering them as a consequence of his job.
Monsters, Aliens, and Weirdness
- First Appearance: Quo Vadis
- Animal Motifs: While not overt, its pilgrimage to Ryuga Forest is similar to legends about old elephants traveling to an elephant graveyard.
- Elephant Graveyard: Ryuga Forest is essentially this for Niruwanie.
- Gentle Giant: Actively went out of its way to avoid harming humans.
- Treants: It's a Tree Kaiju.
- First Appearance: Laundry Day
- Expy: Of Pigmon, again.
- World-Healing Wave / World-Wrecking Wave: He attempts to clean the entire world by covering the planet in his cleaning fluid, he either succeeded or just created a big mess.
Alien Vulcanus Joji Haya
- First Appearance: The Business Man Who Came From the Sky
- Blue-and-Orange Morality: He's looking for something beautiful that he can sell back on his home planet, when he finds that in a human woman he has no qualms about taking her.
- Shout-Out: Possibly to the Vulcans of Star Trek, owing to their species name, stoicism and pointy ears.
- First Appearance: Pandora's Cave
- Sealed Evil in a Can: And boy, does he want out.
- First Appearance: The Town That Doesn't Speak
- The Voiceless: They never vocalize, but seem to be able to communicate with each other silently.
- First Appearance: The Extremely Smelly Island
- Evil Smells Bad: Inverted, he smells terrible but is quite a friendly monster.
- Tragic Monster: He only ever wanted a friend.
- First Appearance: The Iron Shell
- Non-Malicious Monster: they're only acting on their survival instincts, it's just that they become dangerous in large numbers
- The End... Or Is It?: After the last one dies it's shown to have laid some eggs.
Hatha Gi NordAn alien from the planet Gi Nord who came to Earth to find the lost heir to the Emperor's Throne.
- Fantastic Honorifics: He is the Emperor's Aide-de-camp.
- Human Alien: Even considering his odd appearance he just looks like a biker.
- Superpower Lottery: Super Strength, Invisibility, Super Senses.
- First Appearance: The Tokyo Protocol
- Bait-and-Switch: We're initially lead to believe that the Purana's feasting on the cities carbon emissions is too good to be true, but at the end of the episode the Purana age and explode leaving behind cleaner air and beautiful foliage.
- The Cameo: One shows up in Mabuze's lab in Ultraman Taiga.
- First Appearance:Flamegon and Michiru
- Beast and Beauty: With Michiru.
- Heroic Sacrifice: He decides to fix Michiru's legs even if it means his own life.
- Treants: Looks like a mix of this and a Hobo.
- First Appearance: Algoth Democracy
SomaA species of prehistoric insect that were found perfectly preserved inside rocks. The Somas were used in an experiment on gifted children to increase their IQs, but two of the test subjects escaped.
- Been There, Shaped History: Or rather, Will Go There Will Shape History, the end of the episode implies that the escaped children will eventually become instrumental in the development of interplanetary travel.