Warning! Tropes and character descriptions will contain spoilers!
Main Characters (Twenty-Fifth Bam) | Organizations (FUG, Wolhaiksong) | Regulars (First Batch, Second Batch, Third Batch, Fourth Batch, Fifth Batch) | Rankers | Irregulars | Jahad Empire (Princesses of Jahad, 13 Month Series) | Floor Guardians | Others
Characters seen throughout the series that are not a part of a categorized sheet.
Io and Punk
The hosts of the Workshop Battle. They are also researchers for Workshop, and help in the development for rewards for the Regulars who participate such as the "White Heavenly Mirror" and "Blood Tamara" items.
- The Announcer: For the Workshop Battle.
- Curb-Stomp Battle: Both end up on the receiving end of one to Madoraco near the tournament's conclusion.
- The Dividual: Their role in the story is virtually the same.
- Expy: Considering their appearance, names and musical theme, one can be forgiven to mistake them as Daft Punk.
- Faceless Goons: You never actually get to see their faces.
- Hidden Depths: Shown to both actually be very good guitarists.
- Improbable Weapon User: Guitars.
- Married to the Job: Appear to love their job in the Workshop as it gives them a chance to further their research.
A researcher in the Tower working on the Workshop's Living Ignition Weapon experiments, and a mother figure to Horyang, Cassano and Beta.
- Motherly Scientist: To Horyang and Cassano. Emily says otherwise, but then again, Emily is Not So Omniscient After All.
- As of chapter 99 of season 2, she has confirmed that all of her affection was real. She then begs Lero-Ro to protect Horyang, Cassano, Beta and even Viole from all those who would seek to manipulate and use them for their own gain.
- Well-Intentioned Extremist: She became a researcher in order to find a way to grant power to the abandoned and enslaved children taken in by the Workshop, so that no one would be able to hurt them anymore, believing that some sacrifices would be needed. Her hopes rode on Horyang and Cassano. It wasn't until Viole spoke with her that she finally realizes that what made Horyang and Cassano happy wasn't being given power, but her motherly affections towards them.
A popular chat program in the Tower that was introduced at the start of the E-rank Workshop Battle saga. She can be asked questions, and she'll answer them correctly.
- Dead All Along: She was a Living Ignition Weapon like her fellow subjects Beta and Horyang, but she was melted down with a solvent to become a component in a future weapon. Emily herself still thinks she's a person living in a tank to cope with the trauma.
- Immune to Fate: A strange one. Emily has been noted as an entity that guides and controls people by creating "artificial paths". These artificial paths eventually meet with naturally created paths and cause completely new paths that lead people to different directions. As a result, Emily can even distort and block a Guide's ability to accurately discern and read paths.
- Living MacGuffin: A lot of people in the Workshop Battle tried to meet her. The living part is gone though; by the end, FUG steals her as a weapon and to gather information.
- The Omniscient: Ask her a question, and she'll give you the right answer. Although in some cases the answers need to be fed to her first.
- People Jars: She's some kind of experimental subject.
- Spell My Name with an "S": Emily or Emile? Official translations go with the former.
The gatekeeper of the Hell Train stationed at Train City. This guardian acts as a defensive system to keep Regulars from boarding the train before the appropriate time.
- Ambiguous Gender: Implied to be male, but since it's not a real person, it's up for debate as to whether it was programmed to be a male.
- Beam Spam: Its main means of attack seem to be firing spears of shinsu at enemies.
- Beware the Quiet Ones: Held its own against Khun Ran, Daniel Hatchid (before the latter forces the guardian out of commission) and even a group of powerful D-rank Regulars.
- Black Cloak: Its clothes.
- Guardian Entity: Programmed to guard the entrance of the Hell Train.
- Projected Man: An illusion created to look like a humanoid.
- Handy Remote Control: And can be activated/deactivated through the simple click of a button on a remote control designed specifically to control the guardian. Both Daniel Hatchid, and Ha Yura, have one.
- Red Eyes, Take Warning: Bam gets a brief glimpse when he bypasses Mirotic.
- The Stoic: Always has the same calm expression.
- The Quiet One: Only spoke once to threaten Ran's team, hasn't spoken a word since.
- You Gotta Have Blue Hair: Kind of a mix of blue-and-green, but still self explanatory.
A former Wandering Minstrel found on the first Stage of the Hidden Floor, now holed up inside the Fruit of Good and Evil.
- Facial Horror: His mouth got slashed for singing damning pieces about the Big Breeders and their true nature.
- Grew Beyond Their Programming: By accidentally stumbling upon Chung mistreating a Data person, Bitas began to question his place among the Minstrels and speak out against them, eventually developing an audience of people willing to fight against him. He continues to display real development, acknowledging the limitations of his existence as a Data person but still growing and changing like an outsider would.
- Realistic Diction Is Unrealistic: He's one of the very few characters to have a speech impediment, stuttering and pausing in all of his sentences. This is a justified trope, as Bitas is a rare case of a Data person malfunctioning.
- The Man Behind the Curtain: All three Big Breeders are actually on the Hidden Hidden Floor, using an Avatar to communicate with the Hidden Floor residents. Chung and Jeok are actually ordinary looking Data people, but Hwang is a special case.
ChungThe weakest and newest of the Big Breeders. He is in charge of the first Stage as the person who gives out its Grand Quest.
- Badass Moustache: Strictly in the sense of being a powerful foe in his own right, but you get the idea.
- Evil Is Petty: He outright ruins Bitas' life to pay for the humiliation he faced over his songs exposing him as a cruel lord.
- For the Evulz: He intentionally gave Bitas bullets capable of killing Data people, simply because he knew how much despair it would case him if he ever tried it against him.
- Sexier Alter Ego: The real him on the Hidden Hidden Floor isn't as well-kept as his Hidden Floor copy. He lacks the armor, the muscle, and the mustache his avatar has.
- Would Hurt a Child: In addition to punishing Bitas, he cursed Medley, his daughter, to be unable to speak/form sentences.
The Big Breeder in charge of the regular Second Stage, the Cold Land.
- A Load of Bull: Unique among the Breeders in that his avatar is the only anthropomorphic animal—in this case, a muscular ox.
One of the oldest and most powerful Big Breeders left on the Hidden Floor. Originally a formless Data being created by Jahad, Hwang desired to become human throughout his time monitoring mortal outsiders.
- Bishie Sparkle: Like Yura and her father, he also has twinkling stars surrounding him wherever he goes.
- Changeling Fantasy: While he put on airs of saving one of Yura's mother's unborn children, he really entered the child's body and assumed the role of her son, just so he could experience what it was like to be human. It took a while, but she finally caught on and realized that she wasn't actually raising her real child.
- Even Evil Has Loved Ones: Despite what he may say about his Yura's mom, he still craved her attention and was genuinely heartbroken when she effectively disowned him.
- Grand Theft Me: He stole the body of Yura's twin brother.
- Half-Identical Twins: Invoked. His current body is that of the boy who would've become Yura's twin brother, and he's explicitly called "male Yura" by Rachel.
- Self-Made Orphan: He grants Data Yura's Mother her wish of being deleted once she crossed the Despair Event Horizon, following her realization that Hwang replaced her son. Hwang himself didn't care, as he only kept her alive to experience having a "mother"—if she doesn't think of him as her son, he wouldn't think of her as his mother either.
- Pinocchio Syndrome: Centuries of guiding outside Regulars through the Hidden Floor made Hwang desire "humanity" itself, leading to him possessing the body of the unborn son of Yura's mother.
- Rewarded as a Traitor Deserves: Jahad figured out his scheme to Become a Real Boy at the expense of the Hidden Floor, so he destroyed his data.
"God" of Guardians
The strongest guardian of the Hell Train, he is revered by all the other Hell Train guardians and he treats them like his subordinates, according to Sachi. Originally created to train Jahad and the 10 Great Warriors by making them undergo "Revolution", he plans to do the same with Bam after the latter encountered him on his way through the train.
- A God I Am Not: He states that he isn't a god and that the title just came from Regulars who were in awe of his strength.
- The Atoner: His dialogue oozes this whenever he talks to Bam for more than five minutes. Apparently, Jahad... did something nasty to the Tower's system with the power he connected with under the Guardian's guidance. It's not too hard to work out what went badly. And, he's hoping to get somebody powered up enough to change things (Urek seems to have been a bust, though not a disastrous one). He also advises Bam not to blindly seek power like Jahad did, since their power can bring conflict and misery even if they have good intentions.
- Curb-Stomp Battle: The last time Sachi saw him, he annihilated a group of Regulars that were reckless enough to challenge him. Justified: his actual job is specifically to bring Irregulars up to snuff.
- The Force Is Strong with This One: Bam notes that he felt a tremendous power exuding from the "god" of guardians, similar to that of Urek (although Urek was greater).
- Lightning Bruiser: Naturally, seeing that he's the strongest and most authorative guardian inside the Hell Train. Barring Urek Mazino, the "god" of guardians has never been defeated by a D-ranked Regular since his conception.
- Our Giants Are Bigger: A very large humanoid being.
- Really 700 Years Old: Existed when Jahad and the 10 Great Warriors first boarded the Hell Train and he pre-dates the conception of the Jahad Empire. This entity is very old.
- Shout-Out: Looks strikingly similar to The Mighty Thor, especially his Marvel Cinematic Universe incarnation.
- Super Empowering: The "god" of guardians and the 'Rice Pot' inside the Hell Train were created solely for the purpose of giving "Revolution"note to Irregulars that enter the Tower. In fact, the entire Hell Train system, as well as all the guardians inside it, were all created in order to train and power-up Jahad and the 10 Great Warriors for their climb up the Tower.
Tower Position: Guide
Princess Repelista's guide, and a member of the same family as Evan. Alumik serves as Repelista's butler wherever Repelista decides to spend her time in the Tower.
- Battle Butler: A Tower Guide who serves as Repelista's butler.
- Good Hair, Evil Hair: Has a handlebar mustache.
- Nice Guy: Takes care of Repelista, and has no problem with Yuri visiting Repelista whenever the Ha Princess wishes.
- Our Dwarves Are All the Same: Like Evan, Alumik is a Silver Dwarf Guide.
- Sharp-Dressed Man: Alumik's butler attire.
- Spot of Tea: Usually seen drinking and offering cups of tea.
This entity introduced itself as a "Power". Since then it has been speaking to Bam and apparently aiding him in his battles, though not without its issues apparently.
- Affably Evil: Despite being quite sinister looking in appearance, its attitude is surprisingly friendly with Bam.
- Break Them by Talking: Seems to be its main MO. However, it's continually hitting the brick wall that is Bam's less than Tower-average view on life. Sure, his words can get the lad thinking, but... not usually in the direction it seems to be trying to push him.
- Deal with the Devil: Attempts this with Bam when he is undergoing "Revolution" with the guardian on the Hell Train; Bam sees through it though. Time will tell how this turns out.
- Enemy Within: The "god" of guardians implies that this is the case with the "Power" for Bam.
- No-Sell: So far, every argument and offer it's made to Bam has stumbled shy of the apparent goal, even if some of it gets used (if not in the way it expected). It either needs to change strategy, or find a better sales pitch.
- Super Reflexes: Aided Bam by helping him react to attacks more quickly, and enhancing his abilities to perceive his opponents moves. Though at the same time giving him constant mental strain as well.
- Take Over the World: Basically what it proposes to Bam, saying that the best way for him to protect his friends to is to take over the Tower. Bam initially rejects it, but eventually comes to agree that it is probably correct.
- The Voice: Was initially this, until it actually appeared in physical form inside his mind when Bam entered the Rice Pot and underwent "Revolution".
The one responsible for selecting and sorting out Jahad Princess candidates.
A data version of the Snake Charmer appears as Endorsi's "Sworn Enemy" on the Hidden Floor.
- Loophole Abuse: The Hidden Floor generates a Sworn Enemy for every visitor and sends them to attack anyone who stirs up trouble. But the Snake Charmer is more interested in watching Endorsi's development. Sworn Enemies are normally compelled to kill their counterpart if they don't want to already, but the system can only compel one mind at a time. Since his mind is distributed, he is able to retain self-awareness and can simply strike at any part of himself that gets compelled to attack Endorsi.
- Teeth-Clenched Teamwork: The Hidden Floor would not have chosen him as Endorsi's sworn enemy if she didn't harbor negative feelings towards him. But since he was able to loophole it's system to help her instead of attack her and he is far too dangerous as an enemy, Endorsi accepts his offer of aid.
- They Were Holding You Back: Endorsi suspects he murdered her loving adopted parents to force her down the path of a Jahad princess instead of growing up a normal girl.