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.
- TheAnnouncer / TheHost: 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. According to Emile, her love for them is probably a lie, although Emile is not necessarily truthful, and can be abused easily if it's provided the wrong information, such as using Emile to inform Cassano that she doesn't love him.
- Motherly Scientist: To Horyang and Cassano. Emile says otherwise, but then again, Emile 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. She's actually an experimental product of the Workshop scientists, and although she potentially knows the answers to everything, she needs to be fed the information first.
Following the Workshop Battle, Cassano had made a deal with Madoraco to have Emile handed over to him, and then joined up with Team Rachel soon after. Cassano and Team Rachel would then use Emile to control the events going on at the 35th Floor's Train City in order to take the Hell Train for themselves.
- 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. Emile 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, Emile 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": Emile or Emily?
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 shinsoo at enemies.
- Beware the Quiet Ones: Held its own against Koon 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: Baam 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.
"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 Zahard and the 10 Great Warriors by making them undergo "Revolution", he plans to do the same with Baam 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 Baam for more than five minutes. Apparently, Zahard... 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 Baam not to blindly seek power like Zahard 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: Baam 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 Zahard and the 10 Great Warriors first boarded the Hell Train and he pre-dates the conception of the Zahard Empire. This entity is very old.
- Shout-Out: Looks strikingly similar to the Marvel depictions of the Norse god Thor.
- 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 Zahard and the 10 Great Warriors for their climb up the Tower.
Princess Repellista's guide, and a member of the same family as Evan. Alumik serves as Repellista's butler wherever Repellista decides to spend her time in the Tower.
- Battle Butler: A Tower guide who serves as Repellista's butler.
- Good Hair, Evil Hair: Has a handlebar mustache.
- Nice Guy: Takes care of Repellista, and has no problem with Yuri visiting Repellista 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 Baam 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 Baam.
- Break Them by Talking: Seems to be its main MO. However, it's continually hitting the brick wall that is Baam'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 Baam when he is undergoing "Revolution" with the guardian on the Hell Train; Baam 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 Baam.
- No-Sell: So far, every argument and offer it's made to Baam 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 Baam 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 Baam, saying that the best way for him to protect his friends to is to take over the Tower. Baam 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 Baam entered the Rice Pot and underwent "Revolution".
The Snake Charmer
The one responsible for selecting and sorting out Zahard Princess candidates.
A data version of the Snake Charmer appears as Androssi'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 Androssi'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 Androssi.
- Teeth-Clenched Teamwork: The Hidden Floor would not have chosen him as Androssi'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, Androssi accepts his offer of aid.
- They Were Holding You Back: Androssi suspects he murdered her loving adopted parents to force her down the path of a Zahard princess instead of growing up a normal girl.