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
Beings that lived in the Tower long before it had been populated by Jahad and other races. Each Guardian is a supreme ruler of their own Floor, and merely accepts the Rulers and Proctors as people doing their work for them. They are the ones who allow people to use Shinsu on their Floor.
1st Floor Guardian: Headon
Voiced by: Hochu Otsuka (Japanese), Christopher Swindle (English)
A very freaky rabbit humanoid who is the Guardian of the First Floor. His job is the selection of Regulars, and introducing them to the rules of the Tower as well as providing Pockets. Which he didn't do with Bam. He doesn't like intruders, to say the least.
- Bizarre Alien Biology: His eyes are in his mouth
- Blue-and-Orange Morality: Nobody quite knows what his alignment, motivation or goals are. But, they more than likely wind up in this territory, given the tests he doles out as part of his job. He has laws... Good luck working them out, though. They seem to shift. Or, are just that convoluted it looks that way.
- The Chessmaster: The number of balls he juggles just the first time you meet him? Yup.
- Chekhov's Gunman: He is far more important than he at first seems.
- Deadpan Snarker: Just ask Bam, Evan, Yuri or Rachel.
- Establishing Character Moment: That monster eel Bam just barely stunned as part of a test; Headon pops it like a balloon in an instant once Bam and the other two have left.
- The Fair Folk: Gets accused of this even in-world when Rachel called him a Fae. Not without cause.
- Great Gazoo: Particularly on his own Floor. This probably goes for all Guardians to a varying degree, depending on their individual personalities and preferences.
- Hair-Raising Hare: If you fail the test, fail to match up to expectations or just... tickle his funny bone, he suddenly morphs to this, rather than the Bunnies for Cuteness you might, at first, mistake him to be. If he didn't shoot here directly for you at first glance, that is. That unique smile of his really helps.
- Secret Test of Character: Appears to be fond of these, despite his denial of Evan's claim regarding Bam's test, he reveals to Rachel that it was indeed a test of courage and true determination. Claiming that Bam was truly worthy to enter the Tower despite how he appeared to first acted when barring Bam's way. Though how sincere this statement was, is up for debate.
- Slasher Smile
- The Trickster/ Trickster Mentor/ Karmic Trickster: He's definitely some brand of trickster-archetype. Working out which one, though, is the problem.
2nd Floor Guardian
A big eel with a serrated beak. Slightly less creepy than Headon. The eel is the Guardian of the 2nd Floor, also known as Evankhell's Hell. It tends to think that Bam looks very tasty. The 2nd Floor Guardian was seen by Bam during the Position Test training in order to teach the Regulars that they need to make a contract with each Floor Guardian so that they can properly use shinsu on each Tower Floor they newly arrive at.
In order to get the injured Rachel through the Floor of Tests, Bam meets the Guardian once more to get permission for a special test that would allow for the injured Rachel to take part in the final Floor of Test exam. The Guardian allows this, and provides the Submerged Fish Hunt test for Bam and company. Bam also asks for a favor to pass everyone if something happens to him during the Guardian's test, which the eel agrees to.
- The Bus Came Back: The 2nd Guardian makes a brief appearance far down the road during the Hell Train saga where it sends Yu Hansung and Evankhell off from the 2nd Floor to try to support Bam's group on a higher Floor.
- Flying Seafood Special: A giant flying gray eel
- Last-Second Word Swap: When he first meets Bam to test if he is worthy of Shinsu, he initially acts surprised but quickly covers it up by claiming that Bam looks tasty.
- Reasonable Authority Figure: While test givers have been various degrees of Jerkass, despite being the Guardian of the Floor he treats Bam kindly and even accepts Bam's request to let all the other Regulars pass should he die.
- Space Whale: Not exactly, but it is a giant monster-like whale-sized eel-thing which floats in high concentration Shinsu with God-like power. So, yes — it is.
- We Will Meet Again: And so they did.
43rd Floor Guardian
The Floor Guardian that has the distinct honor of being the only one that has been killed in the Tower. Its death was at the hands of Enryu when the Irregular appeared on the 43rd Floor to dispose of Jahad's shrine that the King had built there. Left behind at the location of the Guardian's death was a thorn-like object that was recovered by FUG, and turned into an Ignition Weapon at Workshop.
Due to the death of the Guardian, the 43rd Floor no longer has any means of control over it, and is now considered to be a forbidden disaster area of the Tower that the Regulars skip over during their Tower climb. The only way to reach the 43rd Floor is by riding the Hell Train that travels between the 35th and 43rd Floors.
- Berserk Button: Enraged by the amount of death Enryu brought to the 43rd Floor, the Guardian appeared to fight Enryu itself.
- Character Death: Enryu killed the Guardian.
- Curb-Stomp Battle: On the receiving end of one. No matter what the Guardian threw at Enryu, it was no match for the Irregular.
- Not So Invincible After All: Due to Enryu being an Irregular, he was able to kill the 43rd Floor Guardian; beings that were believed to be invulnerable Gods.
- Shapeshifting: Changed into several different forms throughout its battle with Enryu.
- The Undead: One interpretation of what is maybe going on. It's various existing fragments seem possibly ?alive? and very definitely kicking. The larger the fragment, the more creature-like it appears to be. Just ask Bam. Also, don't think too hard about what collecting many of them together in a probably-dead-yet-alive guy could also mean...
A leftover fragment of the 43rd Floor Guardian that was one day discovered by Urek during a past Floor of Death trip. The Irregular would then hand the fragment over to Hell Joe, a resident of the Floor of Death who's goal to one day escape the 43rd Floor left a great impression on Urek.
However, Hell Joe's struggle to defeat South City's Ranker leader, Grand De Sah, through an election vote forced him to combine with the Red Thryssa in order to obtain the power required to oust De Sah by force. The result of the fusion causes Hell Joe to become the new tyrant leader of South City up to the current day.
- Beam Spam: Fires massive shinsu beams from its mouth and claws.
- Color Motif: Just like its name suggest, there's a lot of the color red when the guardian fragment is involved. Particularly when its in fusion form with Hell Joe.
- Curb-Stomp Battle: After Urek manages to stab a syringe into the fused Red Thryssa / Hell Joe that results in the Red Thryssa finally separating from Hell Joe, it doesn't take much longer for Urek to make quick work of the Guardian fragment.
- Eldritch Abomination: The true form of the Red Thryssa is quite an odd looking creature.
- Fusion Dance: Convinced Hell Joe to combine with it, which they do so after Hell Joe failed to beat Grand De Sah in an election to become the new ruler of the Floor of Death's South City.
- Red Eyes, Take Warning: Has red eyes as the Red Thryssa, and makes Hell Joe's eyes turn completely red when they're fused.
- Revenge: The Red Thryssa's primary motivation is to take revenge on Enryu for its past defeat.