Members of the Union who aren't part of an established faction.
The daughter of Roctis. Since her father is still alive, she has yet to inherit his Soul Weapon. As such, she severely resents the other nobles of her generation, who have all become far more powerful than her. Thus, she's come to rely on questionable experiments in order to compensate for her lack of raw strength.
- Bare Your Midriff: When she goes to attack the KSA, she's wearing a combination halter/belly shirt.
- Combat Pragmatist: She's more than happy to gang up, ambush or distract her opponents to win her fights, even when said opponents are already below her level (as Seira and Rael can attest).
- Eye Scream: The first punishment Rai dishes out to her for torturing Seira, Regis and Rael. Had Roctis not interfered, she would have suffered more.
- Killed Off for Real: Frankenstein kills her with the Dark Spear, which devours her soul.
- Mad Scientist: In a twist, because she is not an Elder, many of her inventions are instead credited to 9th Elder who collaborates with her.
- Oh, Crap!: Once she realizes it is Rai who infiltrates her lab.
- The Resenter: She is doubly unhappy for being passed over the seat of Union Elder and for not having a soul weapon, both due to her father Roctis still being an active Elder.
- We Can Rule Together: She offers this to Rael since he was in a similar position to her (His older brother was chosen to be the full clan leader, so he normally shouldn't have been able to inherit a soul weapon). He refuses.
- Whip It Good: The soul weapon she inherits from her father manifests as this, but has an element of Morph Weapon that lets it sprout thorns, become a gigantic serpent, and act almost as Combat Tentacles.
Anti Clan Leader Experiments
Cyberkinetic and bionic humanoid weapons created by Ignes, and the 9th Elder. They were tailor-made with powers similar to the 8th Elder to be able to stand toe-to-toe against the Nobles.
M-21's close friend who also survived the M-Series experiment. Unbeknownst to the Union, he and M-21 hid in secret to strengthen their abilities.
He dies protecting the Ye Ran children from Jake. However, his corpse was recovered by Dr. Crombel's men to use for his own agenda.
- Big Guy Fatality Syndrome: The first casualty among the good guys.
- Covered with Scars: His entire face is covered in scars.
- Death by Origin Story: His death, and his dying words, are the final push for M-21's HeelFace Turn.
- Final Speech: As he's dying beneath the rubble, he still has time to talk to M-21 through the earpiece he got earlier, telling him that he should live on, reassuring him that everything is going to be alright and pleading him to trust Rai and Frankenstein. It's the story's first Tear Jerker, and one of the more powerful.
- Heroic Sacrifice: Stays behind while the students escape to buy them time, which gets him killed.
- Nice Guy: He truly was one of the nicest guys this series had to offer.
A normal human that had been turned into a vicious monster due to M-24's powers. He attacks the Ye Ran students early on, and ends up getting a strength boost thanks to an experiment performed by Crombel. The infected human is the first noteworthy antagonist of the series.
- One-Winged Angel: His final form, perfected by Crombell.
- Small Role, Big Impact: He's the guy who discovered Rai's sunken coffin, making him responsible for the entire plot.
- Starter Villain: The Infected is the primary antagonist of the first Union story arc.
- Worf Effect: A superpowered vampire that wipes the floor with the entire staff of the Union's research base gets killed to show off just how strong M-21 can be at full power.
- You Can Talk?: Crombell is surprised to see him capable of forming coherent sentences.
A Union soldier stationed at Crombel's research center in Korea. He was left-for-dead with the rest of the lab's scientists, but was able to get word to M-21 about the work Crombel did to the Infected before succumbing to his injuries.
8th Fleet Captain
A Union captain serving under the 12th Elder who had been stationed outside Lukedonia. The captain orders his battleships to invade Lukedonia, but were held off easily by the Noble clan leader, Ludis Mergas.
- Ascended Extra: Not in a big way, but he does appear hundreds of chapters later to show that he is still in control of the fleet stationed outside Lukedonia's entrance when Rai and Frankenstein decide to return to the country a second time.
- Eyepatch of Power: Over his right eye.
- Small Role, Big Impact: He is basically a One-Shot Character, but his failed Lukedonia invasion ended up starting a chain reaction that led to the 12th Elder's eventual demise.
A young human boy who was tasked to be a spy for the Union Elders in order to gain information on Frankenstein's work.
- Astonishingly Appropriate Appearance: Despite being unrelatedd, he looks like he might be Frankenstein's son - fittingly, as Frankenstein clearly treated him as one.
- Becoming the Mask: He came to genuinely admire Frankenstein, even trying to warn him when the Union makes a move against him.
- Killed Offscreen: Judging by Frankenstein's reaction to Urokai having Tesamu's necklace,
- The Mole: He befriended Frankenstein in order to obtain his work for the Union. Despite Frankenstein already knowing, he still chose to provide Tesamu some data.
- Post Humous Character: He's only seen in Frankenstein's Flashback Within a Flashback, and in the first-level flashback, Urokai uses his memory to goad Frankenstein into fighting.
- Student and Master Team: The student to his master, Frankenstein.
- Small Role, Big Impact: He only appears in two short scenes, but his Tragic Keepsake is what gives Urokai confidence to fight Frankenstein, leading to Urokai losing his eye (and pride), leading to his defection to the Union. And that's not mentioning whatever data Tesamu might've stolen.
- Tragic Keepsake: The necklace he wears has is a keepsake of his (presumably deceased) mother. Later, it becomes one to Frankenstein as well, although as a keepsake of Tesamu rather than his mother.