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Traveling Companions

    Riko 
https://static.tvtropes.org/pmwiki/pub/images/riko_anime.jpg
Voiced by: Miyu Tomita (Japanese), Brittany Lauda (English)

A spunky young orphan who dreams of scaling the Abyss and uncovering its mysteries. To do so, she must prove her worth in spelunking to attain a prestigious White Whistle. Her discovery of Reg during an excavation only reinforced her goals, finally coming to a head when she receives a message from her supposedly late mother and legendary White Whistle, Lyza: "I'll be waiting at the bottom of the Abyss."


  • Ass Shove: The antidote to the venom she was poisoned with could be either administered orally or as a suppository (seeing how Riko was unconscious and how Reg blushed, it was apparently done via the latter procedure).
  • "Awesome McCool" Name: Fond of coming with names for unknown relics. She was the one who called Reg's laser attack the "Incinerator".
  • Back from the Dead: She was dead upon birth, but a certain relic (originally thought to protect those inside from the Curse) brought her back to life. Even though normally resurrected beings tend not to live long after being resurrected with said Relic, Riko seems to be healthy and shows no signs of deterioration.
  • Beware the Nice Ones: While she's never portrayed as totally powerless or harmless, and is the main figure involved in planning most of the group's fights, it's still something to behold when she finally snaps after seeing all the suffering that Bondrewd has caused, and kills the absolute hell out of his last useful body.
  • Boyish Short Hair: She sells her pigtails to power Majikajya's speed suit. While she is still feminine, her new look complements her growth as a delver and adventurer.
  • Bring My Brown Pants: She wet herself after seeing a weird monster at Ozen's place.
  • Butt-Monkey: She has it just as badly as Reg. She's been embarrassed and humiliated through no fault of her own, trauma follows her everywhere, and situations almost always take a turn for the worse.
  • Cordon Bleugh Chef: Anything she makes is delicious and nutritious, but its presentation leaves much to be desired. But both Reg and Nanachi move past this really quickly, since she's far better than either of them.
  • Cunning Linguist: Due to Orth being a hub of different peoples and occasionally receiving guests and delvers from foreign countries, Riko's Orphanage also runs tours of the Abyss. Some of the orphans are thus trained to swiftly learn useful phrases and expressions of people they meet to improve their abilities as tour guides. This comes in handy for when Riko's team has to communicate with the Hollow mutants down in the Sixth Level, who don't all speak whatever lingua franca Orth's inhabitants and the rest of the world converse with.
  • Extreme Omnivore: This girl will eat anything, from other people's discarded leftovers, to the strange, flea-infested stew served to her in the City of the Unreturned. She often suffers from food poisoning.
  • Girlish Pigtails: She usually wears her hair in two long pigtails, fitting her cheerful and bright personality.
  • Godiva Hair: In the anime, whenever Riko goes topless (such as being suspended naked from the ceiling as a punishment), her hair will cover her chest.
  • Handicapped Badass: While she ends up getting to keep her arm after the incident with the Orb Piercer, she has some permanent loss of movement and sensation due to nerve damage, and spends the rest of the series wearing a large brace over her wrist and hand.
  • The Heart: Though she's not a fighter, Riko's relentless positivity, friendliness and drive make her the glue holding the group's morale and sanity in place. Reg is extremely grateful for her and devotes himself to protecting her life, while Nanachi finds their own passions reignited thanks to Riko.
  • Inelegant Blubbering: Being a young girl, Riko is not one to hold back when it comes to tearing up. Watery and reddened eyes, drooling mouth, and dribbling snot are common occurrences.
  • Innocent Fanservice Girl: Since she's a child, this characteristic is mainly used to embarrass Reg rather than for fanservice, but otherwise she follows the usual trappings of this trope. Deconstructed to some extent—she also demonstrates total obliviousness to Reg's discomfort with her examining and probing his body while he was unconscious.
  • Innocent Prodigy: She's got quite the scientific and analytical mind, memorized an entire catalogue of relics, is well-versed on cave raider techniques, and can improvise a good meal out of some of the more bizarre species in the Abyss without having seen them before. Nevertheless, she's still just a child, and the Abyss does not play well with children.
  • It Runs in the Family: Her mother was a wild woman with little patience for rules, and a burning desire to see the bottom of the Abyss with her own two eyes. Clearly, the apple did not fall far from the tree.
  • Living on Borrowed Time: Ozen muses that whatever magic reanimated her from stillbirth is going to burn out sooner or later, though it's unclear if she really believes that or was trying to crush her will. Riko herself asserts that she's fine with dying young, and redoubles her determination to rush to the Abyss' bottom ASAP.
  • The McCoy: She is effectively the emotional center of the team, and it is often up to her to keep up the morale, usually pushing the indecisive Reg into getting over his general lack of self-confidence as well as reminding the more pragmatic and cynical Nanachi of their inner emotions.
  • Meganekko: Obviously. Her eyesight isn't actually impaired though, but she suffers headaches without her specially-made glasses due to the Abyss' influence on her as an infant.
  • Nipple and Dimed: In the manga, her chest is on full display a few times.
  • Nobody Poops: Averted, adding to her Butt-Monkey tendencies. It doesn't help that she's the sole human of her party, making her especially susceptible to incontinent stomachaches.
  • Not So Different: With Bondrewd; Nanachi on at least two separate occasions reflects with concern on a couple of quirks the two of them share, and the man himself sees her as a kindred spirit after she instantly figures out the purpose and inspiration of his experiments.
  • No Sense of Personal Space: She loves getting up close and glomping her friends, almost oblivious to their embarrassed reactions... not that they (Reg in particular) mind.
  • Parental Abandonment: Her father died in an expedition before she was born. Her mother chose to continue pursuing the Abyss' greatest enigmas, and is as good as dead to the surface world.
  • The Pollyanna: No matter what kind of horrors the Abyss throws at her, Riko always keeps her passion and enthusiasm. Even when she breaks down, she recovers quickly.
  • Plucky Girl: The trials and tribulations she goes through would probably break the minds of many adults, much less a twelve-year-old girl. Incredibly, she always finds the strength and willpower to march on forward towards her dreams.
  • Scars Are Forever: She gets a prominent and debilitating scar on her left arm after Reg botches the procedure to amputate it. She does not hold it against him though, and considers it proof of his desire to protect her. It isn’t really referenced again after the team departs the 4th layer.
  • Smarter Than You Look: Two characters express this sentiment (with the exact same words, even) when they compliment her intelligence in contrast to her appearance.
  • The Smart Guy: She has a near encyclopedic knowledge of the flora and fauna in the Abyss, and is knowledgeable in some of its the more obscure bits of lore. She often comes up with creative solutions to the problems she and Reg face.
  • Strong Family Resemblance: She greatly resembles her Disappeared Dad, the Black Whistle Torka, in facial features and build. She inherited Lyza's hair color, though.
  • Supreme Chef: She can make a delicious meal out of anything she finds in the Abyss.
  • Team Chef: Reg and Nanachi are both hopelessly incompetent at cooking, so it's usually Riko's job. This may be part of why Nanachi decides to join the group.
  • The Tooth Hurts: Risking her chances to ascend up a stairwell while in Layer Five, she wakes up later having clenched her jaw so hard a couple of her molars broke off. Thankfully, they were baby teeth.
  • You Can't Go Home Again: She's accepted that she will never be able to see anyone in Orth again. For her, it's either reaching the bottom of the Abyss, or perishing in the attempt.
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    Reg 
https://static.tvtropes.org/pmwiki/pub/images/reg_made_in_abyss.png
Voiced by: Mariya Ise (Japanese), Luci Christian (English)

A mysterious robotic boy discovered while Riko was exploring the 100-meter mark of the Abyss. A walking assembly of artifact-worthy features, such as lightweight metallic limbs, a horned helmet, durable-yet-soft skin, and extension cables of unknown material, it is clear that he originated from somewhere much deeper. With no memory to recall his origins, he joins Riko in her quest to find out who he is, and why he came to the surface in the first place.


  • Achilles' Heel: His navel is the thinnest part of his skin and can thus be penetrated far more easily than the rest of him.
  • Amnesiac Hero: He doesn't remember anything from before Riko forcibly woke him up by overcharging him. His origins and past are one of the series' greatest mysteries. However, the few memories he does recover confirm that he crossed paths with Lyza at some point.
  • An Arm and a Leg: His right arm is severed after Bondrewd and the Umbra Hands begin dissecting him. Finding his maker to get it reattached becomes another goal for him.
  • The Big Guy: Having both Super Toughness and quite the combat prowess, it is often up to him to protect the physically weaker and fragile Riko.
  • Butt-Monkey: Very rarely does anything ever go right for his dignity. He's been placed in several humiliating scenarios, most prominently in regards to other characters observing or attempting to observe his penis. It happens so frequently that it practically becomes a Running Gag.
  • Cast from Lifespan: The Incinerator is directly tied to whatever makes Reg tick. If he uses up all of his remaining charges, he'll deactivate permanently. Thankfully for him and his friends, absorbing large quantities of electrical power can recharge him enough to give him extra shots.
  • Catchphrase: "Doshigatai!" (translated as "Irredeemable!"), used in a variety of situations, mostly comical but sometimes dramatic. Interestingly, chapter 16's flashback shows Lyza using this exact phrase, implying that this might be a Borrowed Catchphrase.
  • Declaration of Protection: Alongside his determination to uncover his lost memories, he makes it his goal to protect Riko from the dangers of the Abyss. He's not perfect at the job, but he's done admirably.
  • Eating Machine: He can eat and taste food just like any other kid.
  • Eating Optional: In the absence of food, he can also recharge himself with electricity. But given that the Abyss is short in power outlets and plentiful in tasty animals, he prefers food.
  • Exploited Immunity: Reg exploits his immunity to the Abyss' curse in his fight with Bondrewd by forcing the man to chase after Reg as he ascends from the Sixth Level. By the point they reach the fifth level, Bondrewd has transformed into a creature similar to Nanachi underneath his gear.
  • Feel No Pain: Averted. In spite of being a robot, his body is perfectly capable of simulating pain. Whatever attacks he receives genuinely hurts him. He can even experience phantom pains after his right arm was severed.
  • Handicapped Badass: Despite losing his left arm, he still delivers a great deal of ass kicking to Bondrewd. Though being a robot, this may not be permanent.
  • Hellish Pupils: He's got these to further emphasize his nonhuman origins.
  • Ideal Illness Immunity: Since he is not an organic life-form, he is immune to most of the dangers of the Abyss. This includes the ascension curse that has sent many delvers to their early graves.
  • Lethal Chef: While Riko was incapacitated, he tried to make food after being forced to consume Nanachi's own horrid cooking, but his attempts were said to literally taste like excrement.
  • The Kirk: Forms an indecisive and self-doubting center between the idealistic Riko and the more pragmatic Nanachi.
  • Made of Iron: His durability is something else, being able to withstand fire, resist drilling, slashing, and blunt force. Even his soft, silicon-like skin is almost impervious to damage or penetration, save for the relatively thin spot that marks his navel.
  • Muscle Angst: A minor example, but he is disappointed when he realizes that none of his muscles are growing no matter how much training he puts in and how much physical stress he withstands.
  • Muscles Are Meaningless: Reg is extremely skinny looking, but he's far stronger than any human and can even go toe-to-toe with veteran Delvers with sheer brute force. His non-organic nature is the justification.
  • The Nose Knows: He has a very keen nose. He recognizes Nat before he removes his hood, and he is able to tell that Marulk is a boy because of how he smells.
  • Nice Guy: He's kind and polite to almost everyone he meets.
  • Pint-Sized Powerhouse: He looks no older than a boy in his early teens, but is strong enough to wrestle with most monsters in the Abyss and leap enormous heights.
  • The Promise: He makes several promises to Nat, Jiruo, and Habolg to keep Riko safe. Unfortunately, not even a super-powered robot can counter every threat of the Abyss, so he takes his failures really hard whenever she gets hurt under his watch.
  • Puppy Love: It's painfully obvious he's enamored with Riko. He even considers her his precious treasure.
  • Quest for Identity: The reason he ventures into the Abyss, aside from protecting Riko, is to discover who he is, who made him, and for what purpose.
  • Telescoping Robot: His arms can extend for 40m, which comes in handy when spelunking, fighting, or picking jars from the upper shelf.
  • Raging Stiffie: His delving equipment is fully functional. It never happens during a moment where he wouldn't be embarrassed.
  • Ridiculously Human Robots: As far as personality and emotions go, Reg behaves exactly like a human kid. His body also looks very human-like and perfectly mimics human biological responses, such as crying when he's distressed or blushing when he gets embarrassed. The only parts of him that stand out as glaringly mechanical are his limbs. Whether he's really a robot or some sort of cyborg, and who or what made him (and why), is one of the main mysteries of the series.
  • Robot Kid: He looks about Riko's age, and is just as naive as her.
  • Rocket Punch: His main form of attack, since the incinerator tends to be to powerful for constant usage
  • This Is Unforgivable!. Hurting Riko will generally make Reg react this way. Seeing Bondrewd's experiments, especially what he did to Mitty and Prushka.
  • Supernatural Gold Eyes: Has bright, golden eyes and is anything but ordinary. The eyes themselves seem to have a built-in telescopic zoom, shown when he spots a pursuing cave raider from a great distance.
  • Walking Shirtless Scene: He was found wearing just a cape, pants and helmet (his legs and feet are metal anyway), and while he wears shirts in the orphanage, he ditches them again once the adventure starts. Though it's not that he really needs them.
  • Wave Motion Gun: Each of Reg's limbs can fire an extremely powerful laser that annihilates everything in its path, nicknamed the "Incinerator".
  • We Named the Monkey "Jack": Since he doesn't remember his real name, Riko names him "Reg" after her old dog. Subverted when it's revealed he was known as Reg even before he came to the surface.

    Nanachi 
https://static.tvtropes.org/pmwiki/pub/images/nanachi_made_in_abyss.png
Voiced by: Shiori Izawa (Japanese), Brittney Karbowski (English)

A mysterious being who rescues Reg and Riko in the Cup of Giants. Nanachi is a Hollow, or somebody whose body was mutated by ascending from the Abyss's sixth layer; while Hollow are usually monstrous in appearance, Nanachi somehow gained the form of a cute bunny humanoid. Nanachi makes a home in the Cup of Giants with Mitty, a fellow Hollow who was reduced to a fleshy blob. Taking care of Mitty in the depths of the Abyss has provided extensive medical knowledge, and while initially secretive and a bit abrasive, Nanachi has a truly good heart. They are burdened with a terrible past, particularly with the infamous White Whistle Bondrewd the Novel...


  • Ambiguous Gender: While usually assumed to be female (including on this very wiki), Word of God is that Nanachi's sex is unknown. It should be noted that Nanachi uses the pronoun oira which is neutral/masculine, and is depicted as looking gender-ambiguous in flashbacks. And the official French translation treats Nanachi as male.
  • Beast Man: Nanachi looks like a humanoid rabbit, with paws, huge ears, and a tail. They used to look like a normal human before the Sixth Layer's curse of mutation.
  • Blush Sticker: Played with. Nanachi has two round patches of lighter-colored fur in their cheeks that evoke this effect, giving a mischievous and cute look.
  • Break the Cutie: Poor thing has gone through a lot: was manipulated, experimented on, and used by Bondrewd, had to see their best friend suffer horribly, and was forced to lure other unwitting kids into the same fate. By the time Reg and Riko find her, the only thing keeping Nanachi alive is that a way to release Mitty from her cursed form still hasn't been found.
  • Cat Smile: Nanachi's upper-lip is permanently this way and it adds to her mischievous and snarky persona.
  • Cool Big Sis: Not in physical stature but in outlook. Nanachi's the member of the team who has the most experience with the Abyss and is generally suspicious of the motives of people and creatures she meets due to horrible past experiences. However once Riko and Reg have earned friendship and trust, Nanachi is constantly on the lookout for the team's welfare in every new situation they encounter, reminding Reg of the need for him to protect the otherwise defenseless Riko, and generally acting as the Team Mom.
  • Daddy's Little Villain: Bondrewd’s implied view of Nanachi. He is completely aloof of the PTSD inducing, soul-crushing horrors he’s made her witness. However, he treats her like a protégé, even after she returns from her escape. Rather than being angry at losing Mitty, it's almost as if Nanachi just finished HIS experiments.
  • Deadpan Snarker: Rather abrasive and sarcastic, especially early on before warming up to Rico and Reg.
  • Death Seeker: Averted. Reg makes Nanachi promise not to commit suicide after he puts Mitty out of her misery. Nanachi's response indicates Reg's concern was well-founded, but they keep the promise, choosing to go traveling with him and Riko and put off dying to be with Mitty for later.
  • Dr. Jerk: A little bit early on, bossing Reg around and acting somewhat haughty, but quickly warms to them.
  • Half-Dressed Cartoon Animal: Nanachi seldom wears anything from the waist up. While the coverall does have a chest flap, it's usually worn as an apron, unless required to dress up all the way for a particularly dangerous area.
  • Hates Being Touched: Played for laughs. Nanachi is visibly uncomfortable whenever anyone (especially Reg) gets too close, but Nanachi's luxuriously fluffy fur and pleasant scent makes that an inevitability.
  • Lethal Chef: Nanachi can't cook anything tasty but eats what is made anyway since there was no one else to rely on until Riko and Reg came down. This is partially because they originally lived off of Bondrewd's tasteless diet cubes, meaning that literally anything tastes better to them—Reg manages to cook a meal that literally tastes like crap, and after declaring it even worse than their own cooking, Nanachi just keeps eating it.
  • The Medic: The time spent as Bondrewd's assistant, and the many, many efforts to save Mitty, have left Nanachi with a vast knowledge of the human body and the medicinal properties of the flora and fauna of the Abyss. For example, knowing how to use the Fourth Layer's parasitic/symbiotic mushrooms to heal Riko's arm and keep her health stable.
  • Nice Hat: Wears what appears to be a heavy delving helmet with the scaly neck armor that's permanently eased to the back of the head.
  • Not So Stoic: Generally very composed and detached, or snarky, even when watching Reg sobbing uncontrollably over a seemingly-dead Riko. Nanachi doesn't show much emotion at all until Reg euthanizes Mitty; this was done at Nanachi's request, but it brings out many years of pent-up emotions. The human-form Nanachi was slightly more emotive, but only cried once—immediately after Mitty was mutated from a human into a mindless blob. A more lighthearted example happens when Riko cooks Nanachi their first good meal in probably their whole life, and Nanachi ineffectively tries to downplay their obvious foodgasm.

  • Shown Their Work: The authors' portrayal of Nanachi as The Medic of the team clearly shows that they know their stuff, from the set of surgical instruments that while largely Bamboo Technology-based are pretty much spot-on, to a Deadpan Snarker attitude the surgeons are notorious for.
  • Smells Sexy: Apparently, their fur has a sweet and pleasant scent. Just ask Reg. Or Majikajya, who calls them "nice-smelling Nanachi". Ironically as a human child other children would stay away from Nanachi due to the bad smell from rooting in the garbage for food.
  • The Spock: Marred by their prolonged time of living within the Abyss, Nanachi has developed a cynical outlook, and a somewhat cold disposition, and is overall more focused on using pragmatic means to ensure their own survival.
  • Street Urchin: As a little kid, Nanachi used to live in the streets of a mercilessly cold country, rummaging for useful or edible stuff in garbage dumps by day, and sleeping in an old drainage system by night. Then Bondrewd came along, looking for volunteers to take part in a research project in the depths of the Abyss...
  • Supernatural Gold Eyes: Played with, or maybe inverted. As a human, Nanachi had golden eyes, similar to Reg's. The transformation into a rabbit-person changed their eye structure and made them greener. Whether this has any connection to surviving the sixth layer's curse with their humanity mostly intact, unlike all others who have attempted this, is unclear.
  • Sympathy for the Devil: Even after all the awful things Bondrewd has done to Nanachi and their friends, Nanachi can't help but soften up to him a bit at his congratulation for defeating him.
  • Vague Age: Although Reg initially assumes Nanachi is about the same age as Riko, this is never confirmed, and it's not clear what gave him that impression. Flashbacks showed them looking smaller and younger, but it's unclear how long ago that was, or how old they were when they were human. Being a unique rabbit-person with some metaphysical connection to an immortal mutant, and spending much of their life in an Eldritch Location that distorts time, makes this even harder to figure out.
  • Verbal Tic: "Naaaa~" Nanachi tends to use it either on its own or at the end of a sentence.
  • Worth Living For: It's heavily implied that after they found a way to kill Mitty, they planned on offing themselves to escape it all. Meeting Reg and Riko (and especially after trying Riko's cooking) gave them the push Nanachi needed to keep going, deciding to watch over the two's descent into the Abyss.

The White Whistles

    In General 

https://static.tvtropes.org/pmwiki/pub/images/mia_whitewhistles.png
From top left going clockwise: Bondrewd the Novel, Srajo the Mysterious, Lyza the Annihilator, and Ozen the Immovable

The greatest delvers the world has to offer, these powerful individuals are humanity's best bet at solving the enigmas within the Abyss. The people of Orth idolize them, enemies and rival countries fear them, and the Abyss' monstrosities pale in comparison to them. Each possess a unique White Whistle that is tied solely to their respective owners, making them worthless in the hands of others. They have to be earned, and these legends have proven themselves by conquering the full-course gauntlet that is the Abyss. There are five currently recognized by the Delver's Guild of Orth: Lyza the Annihilator, Ozen the Immovable, Bondrewd the Novel, Srajo the Mysterious, and Wakuna the Chosen.

  • Authority Equals Asskicking: White Whistles tend to be responsible for leading their own teams of cave raiders, and are naturally the strongest and most likely to survive of them all.
  • The Dreaded: All White Whistles have titles like the "Annihilator" or the "Immovable" based on their deeds and fields of Abyss exploration. Suffice to say, they've earned these titles and their white whistles for a very good reason, and all other delvers treat them with a mixture of fear and respect.
  • Department of Redundancy Department: For three of them, their title matches their epithet- Lyza the Annihilator, the Sovereign of Annihilation; Ozen the Immovable, the Unmovable Sovereign; and Srajo the Mysterious, the Sovereign of Mystery.
  • Empowered Badass Normal: They must already have proven themselves to be bona fide badasses to earn the right to use the Abyss' relics to enhance their already incredible abilities to superhuman levels.
  • Heroic Sacrifice: Only White Whistles can enter the Sixth Layer, but unless they possess a relic or technique that can bypass the Curse's effects, it's a one-way trip. Throughout the course of history, many White Whistles have forfeited all hope of ever returning home to advance to the Sixth Layer, sending up discoveries that would hopefully slip past beasts and obstacles, and into the hands of a cave delver above. This is called a "Last Dive", and is traditionally regarded by Orth as a hero's final act.
  • Human Sacrifice: What's essentially necessary to make a White Whistle — each one is made from a pertified heart of a person dying from Curse of the Abyss. What's especially cruel is that the sacrifice has to be voluntary, with the sacrifice giving all their devotion to a whistle's future bearer, ensuring that they're the whistle-to-be's close friends or loved ones, and making the experience particularly traumatic for them.
  • The Magnificent: All of them have a special extra moniker of this form, based on their personality, ambitions, and/or special abilities.
  • Nice Hat: Snazzy headgear seems to be a prerequisite for White Whistle bearers, and is in fact the easiest way to identify one from the other.
  • Older Than They Look: It is implied that most White Whistles either stop aging or at least age very differently from normal humans. Ozen, for example, looks like she's in her thirties while she's actually in her eighties, and the very concept of age is inapplicable to Bondrewd with his Body Surf. Not helped by the fact that they prefer to live in the Abyss, where time slows more and more in the deeper layers.
  • Plot Coupon: The sound of a White Whistle is needed to activate special relics within the Abyss. One such relic is an elevator that descends into the Sixth Layer through the Sea of Corpses. Unless one were to use a relic that can bypass the Sea, they literally cannot proceed into the Sixth Layer without a White Whistle.
  • Powered by a Forsaken Child: White Whistles are made from Life-Reverberating Stones, which are the petrified hearts of people who experienced the Sixth Layer's curse. Furthermore, the person must place all their devotion to a single person as they suffer, locking their stone to that person alone. That is why stealing a White Whistle is considered a futile effort, and why they are so rare to come across.
  • Red Baron: The Immovable Lord, Lord of Annihilation, Lord of Mystery, Lord of Guidance, Lord of Dawn... it's practically tradition for White Whistles to have grandiose epithets.
  • Weapon of Choice: Each White Whistle possesses at least one unique relic that simultaneously serves as both their specialty (in fighting or exploration) and a testament to their skills as cave raiders (for finding such relics in the first place).

    Lyza The Annihilator 
https://static.tvtropes.org/pmwiki/pub/images/lyza.png
Voiced by: Maaya Sakamoto (Japanese), Shelley Calene-Black (English)

A legendary cave raider venerated for her prowess in surveying, excavating, and combat, and secretly the mother of Riko. Ten years ago, she decided to take her Last Dive beyond the 5th level of the Abyss and disappeared, only for her White Whistle to eventually be recovered and sent back to the surface. Although she is presumed dead, a mysterious message beckons her daughter to chase her down to the bottom of the Abyss.

Her White Whistle resembles a lock, with floral patterns based on Eternal Fortunes.


  • The Ace: Even among other White Whistles, there is something about her that is indicated by an incredible talent and a thirst for adventure. She is highly regarded by fellow delvers as a hero, and the people of Orth proudly trumpets her accomplishments at her Resurrection Festival. As revealed in a flashback by Ozen, she easily achieved Black Whistle, then White Whistle status by the time she was a young adult. There are cave raiders who struggle for promotion well into middle age.
  • Admiring the Abomination: Her written observations of the Abyss' lower layers are filled with sketches of previously-undiscovered, bizarre, and often lethally dangerous beasts. The notes sometimes betray an almost childlike fascination with these creatures.
  • Anime Hair: It's easy to assume her hair is simply blowing in the wind, but a closer examination reveals that it's actually fanning out and curling without any outside influence, which is later revealed to be one of the safer side effects of the Curse of the Abyss. Most of the people who spend a lot of time on the lower levels and frequently have to rise against the Curse have their hair to curl into various unnatural shapes.
  • Cuteness Overload: Her sketches of the hermit rats (friendly rodents native to the sixth layer that nest inside empty shells) are surrounded by little hearts, and she describes them as "absolutely adorable". She also says she has adopted one and is using it as her pillow.
  • Famed In-Story: Tales of her exploits reach all over the world. During her Resurrection Festival, the Belchero Orphanage sold copies of her biography as part of their merchandise.
  • Friend or Idol Decision: She had to choose between the Unheard Bell, a special class relic, or her newborn daughter when her team was nearly wiped by enemies and could no longer carry both. She abandoned the relic and delivered her daughter to the surface. True, she went back for the relic but she made sure Riko was in good hands first.
  • The Herald: While Riko was already set on exploring the Abyss, it is Lyza's letter that kickstarts the story and leads her deeper than the 100 meter mark.
  • Hard-Drinking Party Girl: Jiruo notes that she loves guzzling down large quantities of alcohol. It's one of the several traits making up the troublemaker that she is.
  • Improbable Age: Managed to ascend the ranks all the way to White Whistle before she married and gave birth to Riko, and even afterwards in the most recent memories of her she remains looking incredibly youthful.
  • It's Not You, It's My Enemies: Her given reason for not playing a bigger role in Riko's life. Indeed, revenge by enemies made over the years is a genuine concern, and she instead entrusts her daughter's care to her apprentice Jiruo and the Belchero Orphanage.
  • Light Is Good: Out of all the White Whistles, she's the one with the brightest color palette, and much of her dramatic moments in flashbacks have her bathed in brilliant sunlight. Meanwhile, those who've known her have shown nothing but fondness upon reminiscing.
  • Master-Apprentice Chain: Ozen the Immovable was her mentor, and Lyza would go on to make Jiruo her apprentice. Furthermore, Jiruo becomes the authority figure responsible for Riko's and Reg's growth.
  • Missing Mom: She went on her Last Dive ten years ago, pretty much abandoning her daughter. Riko doesn't resent her for this; quite the contrary, she looks up to Lyza and wishes to become a White Whistle like her.
  • Names to Run Away from Really Fast: Lord of Annihilation.
  • Never Found the Body: Although she completed her Last Dive, there is a grave site in the Fourth Layer that inexplicably contains her documents of the lower layers, her Everlasting Pick, and her White Whistle. Otherwise, it is completely empty.
  • Nice Hat: In contrast to her White Whistle contemporaries though, it's a relatively traditional miner's helmet. However, she adorns it with the biggest, fanciest feather she can find, a habit dating back to before she became an apprentice. The plume she was last seen with was half the length of her entire body.
  • One-Man Army: Known for single-handedly destroying hordes of giant beasts and teams of foreign cave raiders alike. In the past, she was forced to cancel the search for the Unheard Bell after a rival group reduced her survey team down to just one other member and the baby she gave birth to. She later returned downwards, retrieved the Bell, and "settled the score", so to speak.
  • Only Friend: To her White Whistle colleague, Ozen. She knew Ozen since she was a child, and begged to be her apprentice until the latter finally relented. Ozen doesn't show it, but she is in fact grateful for Lyza's friendship as the years went by.
  • Pitbull Dates Puppy: She's a beautiful, confident, ferocious woman who was infamous for getting into fights and coming out victorious. Her husband Torka, although notably a Black Whistle and therefore no slouch in delving, couldn't have looked more like their daughter Riko if he were to grow pigtails and put on glasses.
  • Powerful Pick: Blaze Reap. Ozen notes that, while powerful, the relic was always meant for excavations. It just also happens to double as a very effective Improvised Weapon.
  • Pregnant Badass: She famously led a delving mission to retrieve an important artifact while pregnant with Riko.
  • Rapunzel Hair: Incredibly long, voluminous golden locks that reaches past her knees. Curiously, they also spiral at the ends in large loops, giving her hair the appearance of a swirling cloud.
  • Weapon of Choice: Blaze Reap, the Everlasting Pick. She loads it with Peace Phobia, the Everlasting Gunpowder, to give her swings a destructive kick. After her disappearance, Ozen finds it abandoned, mysteriously marking an empty grave. She passes it on to Riko and says that Lyza has probably already found a new signature weapon.
  • Weapons of Their Trade: Riko's mother Lyza's Weapon of Choice is Blaze Reap, a pickaxe designed for excavation and digging. While it's useful for helping her dig her way down into the Abyss, it's an equally powerful weapon when loaded with the Everlasting Gunpowder, making her a One-Woman Army revered and feared as Lyza the Annihilator.
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    Ozen the Immovable 
https://static.tvtropes.org/pmwiki/pub/images/ozen_2.png
Voiced by: Sayaka Ohara (Japanese), Christine Auten (English)

Out of all the White Whistles, the Immovable Lord is one who shatters human limitations for sheer physical strength. A hot subject of rumors dating back as far as fifty years, she currently operates the Seeker Camp located in the Second Layer, where she awaits the arrival of a certain bespectacled girl...

Her White Whistle is adorned with a pair of horns, resembling the visage of an ox.


  • Ambiguously Gay: While it's never outright stated, it's easy to read her attachment to Lyza as a little more than mere friendship. The way the woman is framed in her flashbacks is downright worshipful, and she's comically horrified when Lyza reveals that she intends to get married.
  • Animal Motifs: The ox, based on her unique hairstyle and whistle design. Strong, stalwart, stoic, and definitely belligerent if given the opportunity.
  • Anime Hair: Her black and white hair is styled in a way that makes her look like she has horns. According to her, she keeps it that way to hide her scars.
  • Art Shift: Her very character design fluctuates between panels. Sometimes she's drawn like a relatively normal woman, other times she's depicted with her cloak enveloping her entire body like a mass of darkness. She spontaneously develops a hunchback as frequently as she loses it. With all these aspects combined with her Nightmare Face, Ozen would visually have more in common with a monstrous ghost than an actual human being. This is Played With in the anime, where in one scene she switches from hunchbacked to straight posture with a sickening snap.
  • Bare-Fisted Monk: Due to the nature of her abilities, she doesn't use any weapons outside of her own arms and feet. She doesn't need to.
  • Big Eater: Subtle, but it's there. When she, Reg, and Riko all sit down to eat, Ozen slices her large cut of meat in half and eats one of the halves in one go. It's not directly shown to the camera like most examples, but it's clear that she has a big appetite.
  • Black Eyes of Evil: Her eyes are usually half-lidded but when she puts on her Nightmare Face her eyes take on this form to emphasize how unsettling she is. In keeping with her character this trope is sometimes Played for Laughs.
  • Blood Knight: She enjoys fighting and gets carried away easily when she gets in the zone, like when she was trying to test Riko and Reg.
  • Body Horror: We get to see what's underneath her sleeves when Reg gets a good hit in. Many, many button pins dig into her flesh, making her arms resemble honeycombs. What parts that aren't covered clearly defines her sinew and tendons, and her skin is a sickly gray color.
  • Break Them by Talking: There are easier and gentler ways to tell young girls they are walking corpses, Ozen.
  • Brutal Honesty: Ozen is not hesitant to tell someone an Awful Truth. In fact, she would twist words to make the Awful Truth even more painful to accept for kicks.
  • Combat Sadomasochist: An extreme example - she's addicted to sticking great big barbed, multi-pronged magical pins into herself so that she can get better at hurting people, and she occasionally forgets that she's supposed to be training or testing someone because hurting them is so much fun. While she's not anywhere near as evil as most examples of this trope, it's easy to see why she isn't exactly fondly regarded by most of the rest of the Cave Raiders.
  • Contralto of Danger: Both played straight and deliberately invoked- Ozen has a deep voice normally, and forces it even lower while trying to intimidate Riko and Reg.
  • Curbstomp Battle: Reg is a robot with incredible strength, extendable arms, the ability to fire lasers, and supreme durability. If it weren't for said durability, Ozen would have ground the boy into fine paste.
  • Creepy Good: With her immense stature, her monstrous postures, her eyes that seem as empty as the Abyss, her arms gruesomely mutilated by hundreds of Amplifier Artifacts and her cruel and sadistic personality, she comes off as more of a monster of the Abyss than a human being. Despite that, she is mostly heroic, if incredibly unscrupulous, and said to be a really good mentor.
  • Creepy Monotone: Speaks with an unsettlingly low voice that does little to endear her to others. Put to terrifying effect when she lectures/monologues to Reg about "God"'s placement in a town like Orth.
  • Cyclops: Not her actual appearance, but a sliver of light is the only visible part of her head when she dons her heavy delving outfit, giving this effect. It's the pearly-white gleam from a hell of a Slasher Smile.
  • Dark Is Not Evil: Her color palette is virtually greyscale, she's frequently draped in dark shadows, and her personality is nasty to boot. Regardless, she's a cave raider at heart who does her job for the benefit of Orth, ultimately cares for Riko and Reg's well-being, and is implied by Marulk and the other inhabitants of the Seeker Camp to occasionally take in people who don't have anywhere else to go.
  • Department of Redundancy Department: Sometimes her full title is given as "The Unmovable Lord, Ozen the Immovable" or something similar. This is partly a translation issue, but the original Japanese phrase does describe her as both "fudou" (immovable/steadfast) and "ugokazaru" (a Sun Tzu reference meaning "immobile like a mountain").
  • Dull Eyes of Unhappiness: There's no life in those eyes of hers, so even a regular smile makes her look humorless and off-putting.
  • Early-Bird Cameo: She appears briefly during Jiruo's story, as a member of the expedition sent to retrieve the Unheard Bell. She's also the one helping Lyza carry the Curse-Repelling Vessel to the surface.
  • Everyone Has Standards: Ozen may be an abrasive loner with a sadistic streak a mile wide who's okay with beating up children to teach them a lesson, but she'll always do the right thing in the end, and has nothing nice to say about Bondrewd.
  • Evil Sounds Deep: In the anime, she deliberately invokes this to hide a Hidden Heart of Gold; she slows and lowers her voice in a way that's supposed to come across as menacing, but instead sounds a little forced and silly. It's the audience's first hint that she's not quite as evil as she seems.
  • Fingerpoke Of Doom: Is so strong that a single flick to the forehead is enough to send Riko rolling into the other side of the room.
  • Good Is Not Nice: She genuinely cares about Riko and Reg and she does want them to succeed. She's just not afraid to literally beat the lesson of just how dangerous the deeper levels of the Abyss are into what she sees as two naive children in way over their heads.
  • Grave Robbing: Justified because of the types of people Ozen and Lyza are. Upon seeing the Everlasting Pick marking Lyza's grave in the Garden of the Flowers of Resilience, Ozen immediately dug it out for Lyza's body to make sure. There was none to be found.
  • Hidden Depths: A side chapter reveals that she is an aficionado for alcohol. One of the ways to gain an audience with her is to gift her with exotic foods that would pair well with booze.
  • Hidden Heart of Gold: While she's a genuine sadist, it soon becomes clear that much of Ozen's unpleasantness is for show - she'll grumble and lash out, but she'll always do the right thing, regardless of its difficulty. This is particularly emphasised in the anime, where she's obviously trying to make herself seem scarier, from hunching her back to artificially lowering her voice.
  • Immortal Immaturity: As Reg points out, she acts rather like a schoolyard bully. Whether she's immortal is open to interpretation, but she is explicitly in her 80's, and in flashbacks to when she met Lyza 20-30 years ago, she looks exactly the same. Some combination of lack of aging and the psychological effects of the Abyss have apparently made her somewhat childish.
  • Impossibly Cool Clothes: Out of her armor she has a euro-goth look, with solid black eyes, and hair stylized like horns. In her armor, she switches to what amounts to a wandering samurai hat, and brass knuckles. The first time she’s shown in her armor, it definitely distracts from the characters around as a combination of “What is that!?” and “Scariest character in the lineup.”
  • Jerk with a Heart of Gold: Ozen is not a pleasant person by any stretch of the imagination. She's callous and completely lacks a sense of tact, and Lyza outright states that her personality is irredeemable. However, she takes her job as a mentor seriously, even accepting lowlifes who wouldn't have a future anywhere else under her wing so they can become delvers. Her past accomplishments are pretty much all about saving people. She’s the closest the story has to a true legendary hero.
  • The Juggernaut: Reg is incredibly strong, yet absolutely nothing he does to Ozen seems to even faze her.
  • Knight of Cerebus: The story was already becoming more overt with its dark undertones, but it's Ozen's introduction and her reveals that veers Made in Abyss into straight-up grim territory. In addition to that, she serves as a preview for what to expect from future encounters with White Whistles...
  • Human Pincushion: The secret to her inhuman strength are the Thousand Human Pins, thorn-shaped relics that bestow their user with the power of a thousand men. She has 120 collected over the years embedded into herself.
  • Master-Apprentice Chain: Former teacher of Lyza the Annhililator, and is now currently responsible for Marulk and a team of scouts. Amusingly, Lyza's apprentice Jiruo could have been Ozen's instead, but the young boy at the time flatly refused the offer and opted for the Annhiliator.
  • Mentor Archetype: An older woman with an extensive teaching career, she later takes up the role of giving Riko and Reg some quick training to better prepare against the Abyss.
  • No-Holds-Barred Beatdown: Her fight against Reg has her mauling him at maximum strength. Not because she needed to though, but because his body wouldn't break no matter how hard she tried, so she ended up having too much fun.
  • Not Hyperbole: She warns Reg and Riko to be careful of the other White Whistles outside of Lyza, especially Bondrewd. She notes that he is nowhere near as gentle as she is. Reg wonders if Ozen was cracking a joke. She really isn't.
  • Nice Hat: The headgear for her armor is a disc with a large brim, wide enough to obscure almost all her face from any direction. It appears to be based on some version of Japanese kasa hat, either on the jingasa infantry helmets, or the face-obscuring straw takuhatsugasa that some Buddhist monks wore.
  • Nightmare Face: She never seems to maintain a conversation without slipping into one every minute or so, especially whenever she's feeling particularly heated. She can easily shift expressions between her normal complexure, an ear-to-ear Slasher Smile, and a face fit for a wraithlike entity within heartbeats. Granted, she was just trying to intimidate Reg and Riko at the time, but even in other situations this trope makes an unexpected appearance.
  • Odd Friendship: With the energetic and outgoing Lyza the Annhililator, who also doubles as her Only Friend. Their personalities may differ completely, but years of adventuring together within the depths of the Abyss has formed the basis for a strong bond of trust and loyalty.
  • One Degree of Separation: As the head of the Seeker Camp, she is acquainted with many expert cave raiders of Orth, including Habolg and Jiruo. She shares a personal history with Lyza, and was even her midwife when the latter was carrying Riko.
  • Older Than She Looks: She has been a White Whistle for 50 years, but she looks like she's in her thirties, at most. She already looked like that when a young Lyza asked her to be her teacher, and Lyza is currently old enough to have a 12-year-old daughter. It's unknown whether this is due to the power of an artifact in her possession or simply from spending so much time in the Abyss.
  • The Resenter: Lyza's late husband Torka is referred to as "dumb face" in her memories, which unfortunately bled a little into her view of Riko when they first meet.
  • Sadist: Her biggest personality flaw - she's not nearly as monstrous as she makes herself seem, but she does genuinely enjoy hurting people, both physically and emotionally, and it does sometimes get in the way of her other, more wholesome desires and obligations.
  • Sadist Teacher: Ozen is a very competent one, but she's a little too fond of muttering how much she looks forward to seeing her students suffer.
  • Samus Is a Girl: First time readers would be forgiven for mistaking the bulky, broad-shouldered, 2-meter-tall delver carrying the Curse-Repelling Vessel for a male character. She is rather svelte without her armor.
  • Secret Test of Character: Her hostile and aggressive behavior towards Reg and Riko was really to meter their aptitude against the dangers of the Abyss. To make a long story short, their evaluation was insufficient.
  • Sink-or-Swim Mentor: Ozen isn't one to leave her protégés to die, but she's perfectly willing to let people get in over their heads as a way of gaining a realistic understanding of their own capabilities and what they're up against.
  • Statuesque Stunner: Her looks are easy to appreciate, and she stands a whopping height of over two meters (6.56 feet).
  • Super Strength: Her claim to fame as a White Whistle is her incredible physical strength courtesy of her collection of Thousand-Man Pin artifacts. However, even she has limits to her strength - even going all-out, she seems to be unable to do any real damage to Reg or snap his arm cables, and states that she can't tear the mysterious piece of paper that the message supposedly from Lyza was written on.
  • The Unsmile: She frequently breaks out an open-mouthed grin that is too wide and doesn't reach her eyes. It's one of her more normal facial expressions, honestly.
  • Wake-Up Call Boss: Ozen's "fight" with Reg proves just how far the heroes are out of their depths, and it takes a crash course from her before the two could even stand a chance against the rest of the Abyss.
  • World's Strongest Woman: Even among the White Whistles, she is known as the one possessing the most raw strength. Among her feats, there's lifting a gondola carrying 30 people by herself, or supporting a 10 meter large rock above her head. Habolg insists these are only "rumors," but she did carry the ridiculously heavy Curse-Repelling Vessel out of the abyss with only a little help from Lyza. With over a hundred Amplifier Artifacts stuck in her body, there is little doubt that she could do these feats with little effort - moreso, these rumors about her have been circulating for dozens of years, and her collection of Thousand Man Pins has likely grown since then, making her even stronger.
  • Would Hurt a Child: Oh yes, she would. It's something to note that she does hold back when it comes to normal kids, resorting to just painful flicks to the forehead and the like, but against Reg (who for all intents and purposes is a child too), she's merciless.

    Bondrewd the Novel 
https://static.tvtropes.org/pmwiki/pub/images/bondrewd_71.png
Voiced by: Toshiyuki Morikawa (Japanese), David Harbold (English)

Ten years ago, a single delver did the unprecendented by establishing a base deep within the Fifth Layer called the Idofront. A wanted criminal, a black market dealer, and a proponent for human experimentation, every bounty hunter who came for his head inexplicably vanishes. Those who have met him suspect him to be a thing masquerading as human. Unfortunately for Riko's party, the only way through to the Sixth Layer is through the Idofront and a fateful encounter with him...

His White Whistle is sculpted into the shape of two hands clasped together in prayer.


  • Affably Evil: To ridiculous degrees. He never gets mad at the protagonists for anything they do against him, up to destroying his research and base. He is ceaselessly cheerful and polite to them, no matter what atrocities he commits, or how violently he fights.
  • Archnemesis Dad: To Nanachi, in a father-figure sort of way.
  • Arc Villain: For the Fifth Layer/Idofront Arc.
  • Awesome Mc Coolname: Many of the relics he has on his person were never put on auction, thus they aren't given standardized titles. Those fanciful names that they go by instead? Entirely of his own invention.
  • Badass Baritone: Along with Evil Sounds Deep. Courtesy of Toshiyuki Morikawa.
  • Badass Longcoat: Wears an impressive one as part of his attire.
  • Beneath the Mask: Played with. It's hinted during the story that Bondrewd is a remorseless individual who just tries to fake having emotions with uncanny results. By the end of his arc, however, it's made pretty clear that he does care about the people he hurts and he sincerely believes the sacrifices he is pulling are worth it. His love for Prushka, Nanachi and all of the children he tortured and experimented on in order to further his goals seems to be entirely genuine.
  • Blade Below the Shoulder: "Sparagmos", an unknown grade relic that he equips to his elbows. It emits a blade of light that cuts and burns, disintegrating anything in its path.
  • Blood Knight: Surprisingly so, even if it's rather Downplayed, but when Reg accidentally activates a Super-Powered Evil Side, Bondrewd's reaction is to get pumped up and express regret for cutting off one of Reg's arms and limiting his fighting ability.
  • Blue and Orange Morality: For all his atrocities, Bondrewd genuinely loves and cares for everyone who came into his sights. He's just completely different in the way he sees and expresses this love, much like Grandfather Nurgle or Desty Nova.
  • Body Backup Drive: Every Umbra Hand under his employment contains a piece of his mind and soul. Kill one, and he'll just possess another.
  • Body Surf: Thanks to the relic Zoaholic, Soul-Slave Machine, he is able to share his conciousness through different individuals, making him pretty much completely immortal.
  • Climax Boss: He is the last obstacle the heroes must overcome before entering the Sixth Layer, marking the beginning of a new adventure into completely alien territory.
  • Combat Tentacles: One of his relics, "Touching The Moon", functions like this. It's actually a native creature of the Abyss, just packed into a portable casing and weaponized.
  • Cool Helmet: Look at it and say that it isn't. It can even shoot lasers.
  • Due to the Dead: When the heroes enter the elevator that will take them to the sixth layer, they discover Bondrewd has burnt funerary incense on the altar. Who he is mourning for exactly is left up to the audience's interpretation.
  • Even Evil Has Loved Ones: Deconstructed. If Prushka's memories, his comments on his cartridges, and his parting words to Nanachi are anything to go by, he can and does feel love, and honestly treats the kids as his own children. He just doesn't see why "love" and "his own children" would have anything to do with NOT putting them under horrendous experimentation and processing.
  • Even Evil Has Standards: Subverted outright, and then continuously. There is no one he won’t mutilate. There is no mutilation too vile.
  • Family of Choice: Lectures Nanachi about this trope when the latter dismisses his claim of Prushka being his daughter.
  • Fricking Laser Beams: He has two weapons that can do this:
    • Sparagmos, Origin-Guiding Light, allows him to fire pinpoint lasers by aiming with his elbow, and its destructive capacity is on par with Reg's Incinerator.
    • Gangway, Ascension To The Morning Star, is a relic built into his helmet. He can emit beams of light from the visor that shoot at erratic angles and bounce harmlessly off obstacles until they hit the intended target.
  • For Science!: His entire motivation.
  • Gadgeteer Genius: Most of his personal relics had been modified from their original iterations to be better suited for portability and combat.
  • Graceful Loser: Once defeated and with his plans pretty much entirely crushed, he still takes time to congratulate the heroes since that means their drive was simply better than his. He states his new drive is to watch them succeed.
  • Hellish Pupils: A single eye is all that is revealed underneath the outfit of his strongest incarnation. It's a wide-open Mad Eye already, but then the damn thing blinks open to reveal an inner layer of multiple pupils. Later on, those pupils sprout individual tendrils.
  • Hive Mind: Those who come in physical contact with the Soul-Slave Machine have a piece of Bondrewd's consciousness implanted into their minds. He can focus onto a single body to fully possess it and call his own, relay and receive information, and give out commands. Some people like Gueira retain more of their individuality, while others like the failed Umbra Hands have their minds destroyed, leaving behind lumbering husks. However, he can only control one person at a time, and a Zoaholic-affected individual can choose to refrain from sending Bondrewd learned information.
  • Humanoid Abomination: Fellow delvers can easily tell there's something wrong with this guy. He isn't even confined to a human form anymore, being a mass of consciousness flitting between his Umbra Hands. Meanwhile, his strongest body's status as a human is... questionable, at best. We only ever see one of its eyes, but that alone is enough to qualify as an eldritch nightmare.
  • Kick the Morality Pet: He seems to legitimately love Prushka, his daughter but later on turns her into a cartridge. It gets even worse once you realise that he generally doesn't understand why what he's doing is wrong.
  • Lack of Empathy: He certainly behaves as such to all of his victims. The truth is more complicated than that.
  • Light Is Not Good: The Lord of Dawn sports a helmet emitting bright light (all incarnations of him), waxes poetic about the future and supposed beginning of an event occurring every 2,000 years, and possesses many artifacts and light-themed attacks that he names after lights in the sky. Yet, his heinous deeds couldn't be any more pitch-black.
  • Loophole Abuse: Normally, to create the life-reverberating stone needed to craft a White Whistle, someone utterly devoted to a delver has to die, devoting all their thoughts to them as they pass. Bondrewd got around this by using the Soul-Slave Machine, sacrificing a copy of himself in another person's body to get a stone.
  • Mad Scientist: With more focus on "Scientist" and less on "Mad". More like "completely alien".
  • Malevolent Masked Man: Always wears his signature mask to identify himself.
  • Manipulative Bastard: Regardless of opinions on the subject, including Bondrewd's himself, Prushka's love for him had been planned from the very start. Reg, Riko, and Nanachi's first fight against him and his special magic trick was a golden opportunity to solidify Prushka's loyalty and desire to protect him.
  • Meaningful Name: "Sparagmos" is the Ancient Greek rite of cutting apart and dismembering a sacrifice to be offered to the gods. A fitting name for what the weapon does, and for Bondrewd's purpose in life.
  • Metaphorically True: When Nanachi expresses disbelief at the idea that he is Prushka's father, he initially attempts to brush the question off by stating they are "distantly related by blood." It's latter shown in a flashback that Prushka was born the daughter of one of the Umbra Hands.
  • Never Bareheaded: You'll never catch him without his Cool Helmet on, because he wears it to hide that he's been Body Surfing.
  • One-Eyed Shot: The only opportunity to see what is under the helmet, which is more than enough to express Bondrewd's insanity. The final eye shot has him possessing another body to watch over the heroes as they head for their Last Dive. It's an astoundingly gentle and tender expression.
  • Powered by a Forsaken Child: His solution to avoiding the Curse of the Abyss is to take orphan children with no history or family to call of their own, cut and strip away all the "unnecessary parts" like the skin, limbs, skeletal system, eyes, etc. while leaving behind the nervous system and certain other organs (because the Curse needs something to affect), and pack the still-living results into cartridges filled with drugs to manipulate feelings of pain, fear, and ecstasy.
  • Prehensile Tail: One of the many notable physical features on his body is a lizard-like tail. It's ambiguous as to whether it is a part of his armor, "Canopy Unto Dawn", or a part of his actual body. His transformation into a Hollow implies the latter case.
  • Reminiscing About Your Victims: When his first cartridge runs out, he tells Reg that box used to be Reshma, a kind-hearted girl who wanted to become a princess. Turns out he remembers the names and quirks of every single one of the kids he has used.
  • Seeing Through Another's Eyes: He can view through Nanachi's line of sight somehow, but it requires him to focus his attention, and he can't hear whatever Nanachi hears or says.
  • So Proud of You: Bondrewd is overjoyed that Nanachi's companions managed to best him, wholeheartedly believing their collective abilities and solution of descending down the Abyss are superior to his own. In addition, he tells Nanachi how happy he is to have met them and gives his blessing. Nanachi is put off, but their regard for the man has markedly softened ever since.
  • The Unfettered: Everything he's done and sacrificed was all for the discovery of the mechanisms behind the Curse of the Abyss, and hopefully an easily-reproducible and efficient method to avert it. If it means giving up a daughter he's loved for years to further his goals, then so be it.
  • The Un-Reveal: We never get to see what's under the helmet. Fitting, since the Bondrewd we know is not even the real body of his. By the point the protagonists meet him, Bondrewd is just a soul that can travel to other Zoaholic-infected bodies freely if killed, so he uses the mask as a way to identify himself.
  • Was Once a Man: A mixture of abusing relics, experimentation, and simply living in the lowest Layer permittable for a White Whistle for years has transformed him into something that can't exactly be called a human.
  • Walking Armory: The sheer number of relics this guy has on his strongest body is mind-boggling. There's "Sparagmos", "Canopy Unto Dawn", "Touching The Moon", "Shaker", and "Ascending to the Morning Star".
  • With Great Power Comes Great Insanity: The Zoaholic tears his mind apart just as much as it grants him the ability to Body Surf and maintain a Body Backup Drive. It's a testament to his willpower that he still remains... driven, but that makes him no less terrifying.
  • Would Hurt a Child: Human experimentation is his specialty, and orphan children just happen to have the least red tape attached to them... His cartridges are built on this, containing just enough of child's biological functions to keep them alive and conscious while removing all of their pesky organs and limbs and cramming the kid into a case the size of a textbook so they'll take the curse of the abyss in his place. His servants also attempt to dissect Reg, cutting off his arm and forcing him to ejaculate into a tube. Then there's his experiments to create Hollows...

Orth

    Belchero Orphanage 
An orphanage in Orth operating under a dour Director and enforced by Moon Whistle Jiruo. Functioning more like a boarding school than an actual orphanage, children who've lost their parents to the Abyss are raised, educated, and disciplined as Bells and Red Whistles. The kids are assigned regular expeditions into the First Layer to hunt for relics, good experience for when they grow up and tackle deeper and more dangerous regions of the pit.
  • Anger Born of Worry: Nat comes to blows with Riko and engages in a shouting match when she declares that she'll be heading down to the Abyss to chase after her mother. He even blurts out that Lyza is likely dead, having been gone for ten whole years inside the pit. Understandably, he just doesn't want to see Riko go and disappear forever from the surface world, as the Curse of the Abyss will forever separate her from home.
  • Cannot Spit It Out: Nat's crush on Riko is as obvious as Reg's, but he can't bring himself to confess his feelings.
  • Covert Pervert: Nat is not above sneaking peeks at Riko during the several times she's been hung naked as punishment.
  • Dean Bitterman: The Director's monochrome color scheme and sour expression certainly leads to this conclusion, and she's the one who oversaw Riko's punishment when the poor girl was hanging naked (apparently a traditional form of discipline in Orth).
  • Heartwarming Orphan: Every child introduced in the story; Shiggy, Kiyui, Riko, and especially Nat.
  • Ill Boy: In a side chapter, it's revealed that Kiyui and some other orphans have caught the mysterious illness afflicting people right before their birthdays. He is bedridden and suffering a heavy fever, and yet all diagnosis concludes that he should have been perfectly healthy. Interestingly, transporting him away from the Abyss seems to not only have improved Kiyui's condition, but behave as if his sickness never occurred in the first place.
  • The Lancer: Nat was this to Riko before her departure. He's a talented delver himself, and is usually the one contrasting Riko's opinions and fantasies with his choice of snark.
  • Mr. Exposition: Shiggy is the one who doles out the general need-to-know information on the Abyss, as well as pulling out charts detailing the Abyss landscape.
  • Orphanage of Fear: Downplayed. The kids are terrified of both Director and Jiruo, they have to work to keep the orphanage funded, and it's hinted that the whole place was once a building with an unsavory background (Riko's room/former execution chamber being a prime example). However, the children aren't left wanting, they get an education and a career path to follow, and even their fear of the orphanage's leaders stem out of their strict enforcement of rules rather than sadism.
  • The Smart Guy: Shiggy is the most obviously intelligent of Riko's band of friends, and thinks up several strategies when it comes to avoiding the watchful eyes of the Director and Jiruo. It is also suggested by Jiruo that he's the one who jury-rigged Riko's electric chair back into working order.
  • Street Urchin: Nat was revealed to be a former street rat, having spent most of his life in the slums until his sister died and he was taken in by the Belchero Orphanage. Reg's fabricated backstory he tells to Jiruo was essentially Nat's own.
  • Token Mini-Moe: Kiyui is the youngest out of all the shown orphans, practically a toddler. As a Bell, he still has a couple years left to go before he can join the rest of the kids on their spelunking trips.

    Jiruo 
https://static.tvtropes.org/pmwiki/pub/images/jiruo_3.png
Voiced by: Taishi Murata (Japanese), Daniel Regojo (English)

The young instructor and overseer of the Belchero Orphanage. He holds the title of "Moon Whistle", which is one step beneath the elite Black Whistles and grants him responsibility for training apprentice delvers. He also happens to be the apprentice to Lyza the Annhililator, who assigned him the task of keeping an eye on her daughter Riko.


  • Bishōnen: Drawn in a more traditionally handsome manner than the rest of the cast.
  • Dope Slap: Has a variant where he slaps someone on the head with a palm and gives it a good grip. Riko is the most frequent victim of this.
  • Hyper-Awareness: He often allows Riko and friends to think they've duped him, but he's always two steps ahead of them. Aside from knowing Reg and Riko were making a break for the Abyss the whole time, it is heavily implied he connected the dots between Reg's appearance, his mysterious mechanical limbs, and Riko's rescue from the giant monster right from the very moment the boy showed up at the orphanage's doorstep.
  • Metaphorically True: He cheers Riko up with a story about her mother's expedition to find the Unheard Bell, telling how Lyza chose to exhaust herself and risk losing her reputation, her decimated survey team, and her own life just to ensure Riko's survival and future. He's being honest for the most part, only omitting the fact that Lyza quickly returned to the Abyss afterwards and wiped out the opposition before retrieving the Bell, which would have undermined the message. He also doesn't mention the true nature of the Curse-Warding Box Riko was carried in, but it's unclear if he was actually aware of it.
  • Master-Apprentice Chain: Was the former apprentice to White Whistle Lyza, and is now instructing orphans to become fine cave raiders themselves, including Lyza's daughter Riko.
  • Only Known By His Nickname: No one calls him by his name in the anime adaptation, except Lyza and Ozen in flashbacks; the kids all call him "Leader." The only time he's referred to by name is when Reg asks a cave raider they meet to give him a message.
  • Parental Substitute: Although Jiruo is only older than the rest of the orphans by a few years, the kids regard him as a father figure. He's this to Riko especially, since her mother Lyza entrusted him with Riko's care.
  • Reasonable Authority Figure: Jiruo did not immediately shut down Riko's requests to be assigned to deeper layers, instead offering to consider them if she achieved the highest evaluation in a single excavation. He also gives her a much-needed pep talk when she was ruminating during her mother's Resurrection Festival.
  • Secret Test of Character: He lets Riko and Reg escape the orphanage on purpose, slipping in a note with Lyza's documents warning the two he will chase them down and punish them thoroughly before they make it to the Second Layer. He's fully aware they will only try again if he successfully captures them, but at least they will stay safe in Orth for a little longer, maybe even improve their spelunking skills in the meantime. If he fails, then he has no choice but to concede to Riko's (and Lyza's) wishes.
  • Stern Teacher: He's quick to track down and reprimand troublemakers, especially considering the usual suspect of shenanigans within the orphanage is Riko.
  • The Stoic: Hardly ever smiles. His expressions never fluctuates much from his light scowl, mirroring his controlled tone whenever he speaks.

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    Habolg 
https://static.tvtropes.org/pmwiki/pub/images/habolg.png
Voiced by: Tetsu Inada (Japanese), John Swasey (English)

A stocky man who carries the title of "Black Whistle", he is an elite Abyss delver and seasoned veteran whom the children of Belchero Orphanage look up to. Even being somewhat advanced in age, he strives towards being promoted and joining the ranks of White Whistles, and has met many of them personally thanks to his position.


  • Acrofatic: He is surprisingly agile for his size, catching up to Riko and Reg in no time even though they had hours of progress to their advantage.
  • Admiring the Abomination: Always having fun whenever he's discussing a White Whistle's exploits. Considering that many White Whistles carry well-deserved reputations as The Dreaded, his delighted gushing comes off as this trope.
  • Affectionate Nickname: The kids from the orphanage call him "Habo".
  • Always Second Best: Downplayed. Habo is the first Black Whistle introduced and he helps fill the audience in on the White Whistles and their accomplishments. He wants to become one and keeps throwing himself into Cave Raiding so he can one day rise to their level.
  • Cool Old Guy: A jovial middle-aged man who is a competent cave raider, looks after the kids in Belchero Orphanage, and is utterly respectful of their choices.
  • Happily Married: To Laffi, although she's exasperated with his efforts for a promotion.
  • Huge Guy, Tiny Girl: His wife Laffi is of average height, but he is so tall and stocky he makes her look like a young girl by comparison.
  • The Knights Who Say "Squee!": A Black Whistle himself, Habolg is a big fan of the White Whistles. He also practically leaps out of bed at the opportunity to meet Reg the moment Nat and Shiggy tells him the boy is a Treasure of the Abyss.
  • Mr. Exposition: He reveals some of the customs held by Orth's cave raiders. Additionally, he is a White Whistle enthusiast who memorized the details and rumors surrounding them. Whenever a White Whistle needs an introduction, the story would cut to him in his house as he describes that White Whistle's background and accomplishments to children.
  • Parental Substitute: Serves as this alongside with Jiruo to Riko and the rest of the orphans, treating them like his own children. A flashback suggests many of the teachings and beliefs held by Riko had been passed down directly from him. When Riko denies his offer to help them down the Second Layer, he behaves throughout the whole affair like a father giving his son and daughter a last farewell.
  • The Storyteller: Nat and Shiggy often go to his place to hear his stories about the Abyss and the White Whistles.
  • Real Men Wear Pink: A robust man who wears a cute set of pajamas and matching hat to bed.
  • Shopkeeper: He and Laffi run a general store in Orth. One of the many duties an apprentice in Belchero Orphanage must take is to assist them with work.
  • Stout Strength: He looks portly and has a gut, but one doesn't become a Black Whistle by being out of shape.

Idofront

    The Umbra Hands 
https://static.tvtropes.org/pmwiki/pub/images/praying_hands.png

Bondrewd's servants. They perform various tasks for him, from collecting samples in the field to menial labor and even combat.


  • Cool Helmet: Face-obscuring helmets that are unique to each individual, and equipped with varying amounts of optical gear and/or Tron Lines.
  • Elite Mooks: Each one holds the rank of Black Whistle, but a few Umbra Hands take it further by being armed to the teeth with relics and toting special backpacks around. They are the ones Bondrewd possesses when he's rearing for a fight.
  • Malevolent Masked Men: All of them wear sinister-looking masks that conceal their entire faces, and they help their master with his inhumane experiments.
  • Mook Promotion: A Umbra Hand named Gueira plays a prominent role in Prushka's flashback chapter, playing with her and looking after her whenever Bondrewd is busy. Attentive readers might have noticed that he was among the ones that got gored to death by the stingerheads.
  • Possession Burnout: Umbra Hands subjected to the Zoaholic's effects with inadequate aptitude cannot take the strain and become little more than mindless zombies. Whenever this happens, Bondrewd sends them to the lower levels of Idofront to perform repetitive, menial tasks.

    Prushka 
https://static.tvtropes.org/pmwiki/pub/images/prushka_2.png
Voiced by: Inori Minase (Japanese)

Bondrewd's daughter. She is very fond of her "Papa" and cheerfully helps him out however she can, blissfully unaware of the darker side of Bondrewd's experiments. She's excited to meet people from the outside, having lived in the Idofront all of her life, and quickly befriends the protagonists. She comes to hold a dream of leaving her home behind and setting off with Riko, Reg and Nanachi on their adventures...


  • Anime Hair: Her hair is strangely curled up at certain parts. It resulted from an incident in her childhood where she tried to climb a staircase and suffered the fifth layer's burden, almost dying in the process.
  • Children Are Innocent: Although she's a bit older than the protagonists, she's even more sweetly naive than they are.
  • Cool Helmet: Resembles an aviator helmet, featuring a hatch where Meinya can pop in an out at her command.
  • Cruel and Unusual Death: Bondrewd uses her for one of his cartridges. This involves amputating and surgically removing everything but the bare minimum the Abyss will recognize as a "human", until she fits into a small container the size of a lunchbox. To make things even worse, what is left of her is somehow still conscious inside that thing, being horribly mutated by the Abyss' curse.
  • A Date with Rosie Palms: Implied. She mentions that she naturally keeps her own door locked because she's at that age after all...
  • Foil: To Riko; where Riko is the biological daughter of the White Whistle Lyza and was left in an orphanage, Prushka was born to one of Bondrewd's lackeys and adopted by him. Where Riko was stillborn in the Abyss and resurrected in the ascent, Prushka was brought to Idofront as a toddler and nearly died in the descent. Where Riko is independent and driven by discovery, cares nothing for authority figures, and feels mixed feelings about her absent mother, Prushka is utterly sheltered and unquestioningly devoted to Bondrewd even after being used by him. The two of them connect when Riko reaches a seemingly insurmountable impasse above the Sixth Layer, and the desire for adventure that Riko ignites in Prushka and the reaffirmation of purpose Prushka helps Riko find leads to Prushka providing and becoming the very instrument that Riko needs to continue her journey.
  • Floral Theme Naming: "Prushka" means "Flower of Dawn", after her father who is known as the Lord of Dawn.
  • Has Two Daddies: A subtle variant. Flashbacks reveal that one of the Umbra Hands, Gueira, played as much of a role in Prushka's protection and growth as Bondrewd himself.
  • Irony: In a way, her Tragic Dream of going on an adventure with Riko and company comes true after all. She lives on as Riko's White Whistle, Meinya is adopted by the heroes as their Team Pet, and Bondrewd is content to sit back and watch over their journey through Nanachi's eyes.
  • Mad Scientist's Beautiful Daughter: She adores her Papa, and is completely oblivious to his less pleasant line of work.
  • Nice Girl: Shockingly, Bondrewd has raised her well; she's polite, dutiful, and generous to everyone. She even makes paper-maché Black Whistles for failed Umbra Hands during her downtime, inscribing messages to thank them for their hard work.
  • Not Quite Dead: It is suggested that Prushka's soul and will remain bound and aware in the Life-Reverberating Stone that what was left of her body became. Riko even at one point claims to be able to tell what Prushka is feeling while being handled by a Hollow.
  • Soul Jar: Her last thoughts as she perishes from the Sixth Layer's curse is to embark on an adventure with Riko and company. This makes her a suitable sacrifice for the Abyss, converting her heart into a Life-Reverberating Stone. In effect, she becomes Riko's White Whistle, and it's implied the girl is happy in her resulting form.
  • Tragic Dream: She always desired to explore beyond the confinements of the Idofront. Meeting Riko was the happiest moment she's ever experienced, so she dreamed of finally heading out on an adventure with everyone: Riko, Reg, Nanachi, Meinya, and even Bondrewd. Alas, her father finally decided it was time for Prushka to be sacrificed...

    Meinya 
https://static.tvtropes.org/pmwiki/pub/images/meinya_1.png

A small, cute animal called a Meinastorim that Bondrewd gave Prushka as a small child. They have been inseparable ever since.


  • Eye Scream: A curious Hollow squeezes Meinya so hard, its left eye bulges out of its socket. Luckily, Meinya's one sturdy critter.
  • Head Pet: For Prushka and later Riko.
  • Ridiculously Cute Critter: A little ball of fluff with long, floppy ears.
  • Team Pet: Rapidly becomes this for the group.

Iruburu Village

A village created by former humans who became Hollows in the Sixth Layer. It operates on its own alien laws of "value" and is apparently sentient.

    In General 

The Capital of the Unreturned, as it turns out, is densely populated by those who have lost their humanity, seemingly to magic outside the reaches of the Abyss. Coming in literally all shapes, sizes, intelligence, and shades of morality, these warped and misshapen folk take shelter within the village, away from the dangers of the Sixth Layer.


  • Ambiguously Evil: The friendlier inhabitants seem nice enough, but they all possess a warped view on civilized conduct. As for the other villagers, it'd be easier to write them off as malevolent if it weren't for the language barrier and lack of discernable visual cues. The fact that many don't even appear to be sapient hardly helps.
  • Blue and Orange Morality: The village certainly possesses a system with defined rules and laws. That being said, the list of concepts that are considered acceptable value is as varied as it is bizarre (ranging from smells to the touch of furry creatures to ripping your flesh apart), and the town metes out very exact, very grotesque punishment for damages rendered.
  • Genius Loci: The village is alive, very tentacled, and will make sure all damages are repaid in full.
  • Merchant City: Literally.
  • Starfish Aliens: Where to even begin? For every villager with a recognizable body shape and form, there are seven more designs that defy biology as we know it.
  • We Buy Anything: If someone wants it, the village can take it from you to give to them. It can also take things offered to it and exchange them for anything of equal value. Anything.
  • Weird Currency: Everything and everyone in the village is assigned a value based on their subjective wants and how much they are wanted. The village hands out bartering coins when incompatible values are transferred. The money can materialize out of thin air, divide by themselves into smaller units, and can't actually be thrown away or stolen.

    Majikajya 
https://static.tvtropes.org/pmwiki/pub/images/majikajya_2.png

A Hollow that Riko meets in the Hollow Village in the Sixth Layer. He has the appearance of a metallic humanoid with a giraffe-like neck, but this is actually a shell which contains his true form.


  • Animated Armor: He's not actually a weird looking giraffe robot, it's a shell. He claims to have no physical form and desires to have an actual body.
  • Blue and Orange Morality: His town has very strict rules regarding trading and ownership. And if someone tries to take something that doesn't belong to them, they will be forced to give up in equal value of what they took, even when that involves having their skin stripped off and limbs removed. When Riko tries to tell Majikajya not to have the creature that tried to take Meinya tortured in this way, after saying that Meinya was priceless to the group, he doesn't seem to understand that Riko simply is horrified by the physical tortures being applied to the creature, asking menacingly if she had overstated the value of Meinya to her.
  • Bizarre Alien Biology: In a different way than most Hollow. Although his robotic appearance is unique by itself, he is actually a gaseous lifeform with no tangible elements, hence the need for the suit.
  • Comically Missing the Point: He refers to Nanachi as "the nice smelling fluffy one". After telling him their name's Nanachi, Majikajya politelly corrects himself:
    Majikajya: Nice smelling Nanachi.
  • Cunning Linguist: He is multilingual, being the main interpretor for Riko's party during their stay in Iruburu. He is also capable of speaking various languages outside of Orth's.
  • Eloquent in My Native Tongue: He talks to Riko's team in a mix of Orth's language and whatever tongue they speak at the village. Sometimes he can't come up with translations for the words he is thinking of, and needs the protagonists to fill in the gaps for him.
  • Mr. Exposition: Gives the explanations about how value works in the village of the Hollows, as well as how they came to be.
  • Super Speed: He owns a specialized robot suit that is capable of dodging and weaving by apex predators. However, it runs into Awesome, but Impractical territory due to being expensive to make, and requiring a valuable fuel source to function.
  • Was Once a Man: He used to be a Cave Raider, but he lost his humanity to the Abyss.

    Faputa 
https://static.tvtropes.org/pmwiki/pub/images/faputa_1.png

A Hollow who lives in the Capital of the Unreturned. Like Nanachi, rather than looking monstrous she has a cute, humanoid form that looks not unlike a fuzzy moth. She's referred to as the Princess of the Hollows, and she claims to have known Reg from his original descent into the Abyss.


  • Ambiguously Evil: Seems to be unconditionally loyal to Reg. At the same time, even her benevolent actions come off as incredibly disturbing, and that's not going into her desire to eradicate the village to release her mother.
  • An Arm and a Leg: Gives up one of her arms and one of her wing-ears to buy back Nanachi.
  • Cute and Psycho: She’s quite unhinged and her normally cute face occasionally distorts into bestial snarls or a Slasher Smile. To determine if Reg is “still Reg,” one of the things she does is pin him down and drive a talon into his navel far enough to be a life threatening stab wound for a normal human. She then tastes the blood on the talon.
  • Cute Monster Girl: Much like Nanachi, her form is rather cute. That being said, she has four arms.
  • Everything Is Better With Princesses: Majikajya describes her as the Princess of the Hollows. The Queen is the village.
  • Forgotten First Meeting: She knew Reg before he had ascended to the top of the Abyss and met Riko. He promised her something.
  • Goggles Do Nothing: Her entire wardrobe consists of pair of goggles, which she wears over her shoulder like a sash.
  • Multi-Armed and Dangerous: In addition to her extra-arms, she seems to possess enormous strength, very sharp claws, and an ability to move extremely swiftly without a sound.
  • Revenge: Yeah, she’s a bit justified in her desire. Her mom(?) was mutated from a cute human child into something closer to a biological building that mutates other people. This happened when the Ganja Corp just started straight up using her for their own purposes.
  • Verbal Tic: Ends all of her sentences with "sosu", which is probably Iruburu's language bleeding into her speech.
  • Voluntary Shapeshifting: Can warp her body somewhat. She flies by wrapping her hair around her body and looks like a Bedsheet Ghost while doing so.

    Maaa 

A resident of Iruburu Villaage. Unlike other Hollows Riko regularly interacts with, he is childish and ineloquent, only capable of uttering out the sound "Maaaaa~" as his only form of communication. Although he initially got off the wrong foot with the group, he is more than willing to make up for it by accompanying Riko throughout the village.


  • Fan Disservice: Clashing against his otherwise simple character design, he has a very pronounced butt. One with notably large pores on both cheeks.
  • Verbal Tic Name: The only word he ever says is "Maaa~", so Maaa-san it is.

    Vueroeruko 
https://static.tvtropes.org/pmwiki/pub/images/vueloelco.png

A human woman who hasn't completely become a Naherate and opposed the creation of Iruburu. She was locked at the bottom of a deep hole because of that, until Riko freed her.


  • Abusive Parents: Her parent, or the person who originally took care of her, often beat and branded her with a hot iron while she was a child.
  • Adoptive Peer Parent: She was this to Irumyuui, Faputa's mother.
  • Ambiguously Bi: Her backstory in Chapter 49 reveals that she was in a lesbian relationship with one of her crew-mates. On the other hand, she displayed a particular fascination with Reg upon meeting him for the first time.
  • Ambiguously Human: She's pretty sure she's still human, but she has clearly non-human abilities such as detecting "signals" from the village and should obviously have died of starvation long ago. Not to mention she doesn't get what the terms "white whistles" or "sixth layer" mean, which means she went into the Abyss before those terms were even a thing. Which chapter 48 and 49 confirm.
  • Be Careful What You Wish For: She initially wanted to be something more than a human. When she saw what the Curse actually did to humans, her enthusiasm rapidly faded and she became an outcast.
  • Dark and Troubled Past: She spent her childhood at the hands of an abusive old man who routinely tortured her to the point she could no longer bear children, and she went to an expedition in the Abyss mostly to get away from him. It visibly did not end well for her or her crewmates.
  • Exhausted Eyebags: After spending years stuck in a hole with failed Hollows as her only companions, her exhaustion is understandable. Especially when it's not clear whether she can even sleep.
  • Godiva Hair: Her long hair ended up deformed by the Curse much like Prushka's, conveniently hiding her naked body.
  • Really 700 Years Old: She looks like a young woman, but she was present when Iruburu was created. Given the kind of ancient trinkets up for sale at the bazaar, the village wasn't exactly built yesterday.
  • Rummage Sale Reject: Justified. She can't run around the village butt-naked, so Riko quickly fetchs an outfit for her from what she can find at the marketplace. However, given the anatomical diversity of Iruburu's citizens, it's a bit hard to find fitting clothes for a human woman, so they have to make do with stuff like curtains or pants for 4-legged critters.
  • Some Call Me "Tim": Since her full name is quite a mouthful, she tells Riko to simply call her "Vueko".
  • Verbal Tic: Has a habit of saying "whuh…" when startled.

    Wazukyan 
https://static.tvtropes.org/pmwiki/pub/images/wazu_narehate.jpg
Back when he was human 

One of the Three Sages, founders and rulers of Iruburu. Wazukyan is usually friendly and in good spirits, but his relentless optimism can come off as a bit unsettling.


  • Ambiguously Evil: There has never been a moment that firmly establishes him as a truly malevolent person. Whenever he does skirt the line, there's usually a reasonable justification attached his actions. Even imprisoning Veko within the center of Iruburu was done partly to ensure she and Irumyuui can remain together forever.
  • Affably Evil: If one subscribes to him being truly morally reprehensible. He's still very welcoming to visitors, and compliments Riko for her successes while giving her a high-five.
  • The Captain: He was the captain of the Ganja Corps, and is currently one of the village leaders.
  • Didn't See That Coming: He could never have guessed that Irumyuui would retain enough autonomy to birth a final and perfected child after transforming into the village, one that has inherited her mother's rage and desire to eradicate them all.
  • Dissonant Serenity: He’s laid back and calm about everything, even in situations that absolutely does not call for it. He's an effective pillar for morale as a result, but at times it comes off as borderline sociopathic. Barely surviving a trip overseas? Eagerness for a new adventure. Traveling into a scary unexplored area? Like visiting a new neighborhood. People dying left and right? Takes it in stride. Forcefully mutating a child? Goes through without a second thought. Cooking her dead children and serving them to others for breakfast? Just a matter of course. Killing her still-living children and serving them as breakfast? Might as well. Imprisoning the child’s surrogate mother inside the child’s now horribly mutated body? Chipper as always.
  • Eats Babies: The one who came up with the idea to butcher Irumyuui's children to bolster food supplies. He certainly had the least reservations out of the rest of the exploration team.
  • Extreme Omnivore: Back when he was a human, he regularly crunched on bugs along the Ganja Corps' expedition so as not to contribute to the strain on their limited food supply. Goes a step further when he applies this to Irumyuui's spawn.
  • The Fatalist: Subscribes to fate, no doubt thanks to his precognitive abilities. Even when facing certain death, he remains unflappable due to an near-unshakeable faith in his group's survival. However, he also believes it imperative that he seizes his destiny with his own hands, hence the birth of Iruburu Village.
  • Foil: Like Riko, Wazukyan possesses near-infinite optimism and a deep yearning for the Abyss that he himself cannot properly explain. During a pivotal moment of the Ganja Corps flashback, he even takes up the role as the team's cook. And though they aren't fighters, the two are nevertheless the unquestionable leaders of their respective groups for their decisiveness and fortitude. Where Riko and Wazukyan differ however is their willingness to use others for their own gain; Riko would never sacrifice anyone regardless of circumstances, and was horrified upon seeing a victim being reduced to a tool, treating the matter with all the grave respects it deserves. Wazukyan on the other hand instigated such a scenario multiple times, and was quite happy with the results despite how everyone else felt about it.
  • Helping Would Be Kill Stealing: He doesn't help in the fight against the Fuzosheppu because he thinks the villagers will have more fun defeating the monster by themselves.
  • Indy Ploy: There was never an actual plan laid out for delving into the Abyss, something he was quite transparent about since the beginning. Most of his leadership consisted of improvising with whatever that had fallen into the hands of the Suicide Corps, be it their encounter with natives, adoption of Irumyuui, partnership with robots, or relics of power.
  • Lack of Empathy: The best way to explain why this man can be so profoundly disturbing. His friendliness is genuine - not once had he ever spoken ill of anyone, refused to lend a helping hand, or behaved in a cold manner. And yet, when the Ganja Corps expedition went foul, he seemed truly oblivious to the anguish of everyone around him, examples including Belaf's mental breakdown, Vueroeruko's conflicted emotions, and Irumyuui's grief over her dead children.
  • Large and in Charge: He was pretty tall as a human. In the present as a Hollow, he towers over everyone else in the village.
  • No Party Like a Donner Party: With everyone wasting away from starvation, dehydration, and petrification, he finally took it upon himself to make use of the cadavers of Irumyuui's children. When that wasn't enough, he proceeded to snatch the babies right out of Irumyuui's arms for more meat.
  • The Pollyanna: His defining character trait, with an attitude that can best be described as "airy". Even during a crisis where the entire exploration team is infected by a horrible disease and slowly dying off one by one, he treats the ordeal as if it was an inconvenient rainy day.
  • Morphic Resonance: When he was a human, Wazukyan had three vertical marks on his left cheek. This pattern carried over to his facial coloration when he turned into a Hollow.
  • Not So Stoic: Not a textbook example because his mood level is perpetually upbeat instead, but there has only been two instances where his sunny demeanor cracks, both within the span of minutes:
    • His confident smile falters into nervous sweat after Veko begs to know what he has done. Even he was unsettled by Irumyuui's drastic mutations after planting the second wish-granting relic egg inside of her.
    • When Veko makes the decision to rebel against him and jumps off a cliff to kill herself, thus letting Irumyuui wither away and denying his dreams for a home at the heart of the Abyss, Wazukyan completely loses it.
  • Seer: He has some kind of predictive power. He foretold Vueko's arrival the day before it happened.

    Belaf 
https://static.tvtropes.org/pmwiki/pub/images/belafu_narehate_5.jpg
Back when he was human 

One of the Three Sages, founders and rulers of Iruburu. When Bondrewd paid a visit to the village and brought Mitty with him, Belaf saw her and wanted her for himself. He paid a great toll to have a perfect copy created for him, and isn't giving her up easily.


  • An Arm and a Leg: He sold his arms and legs (all 724 of them), half his body length, and part of his sensory organs in exchange for a clone of Mitty.
  • Heroic BSoD: Had an awful one after eating Irumyuui's children to cure the illness he and everybody else was suffering from. He completely fell apart over it, to the point of becoming catatonic and even harming himself. It all culminated in him sacrificing himself to Irumyuui as what he saw as punishment, resulting in his current form.
  • Cunning Linguist: He served as a translator and interpreter in the Ganja Corps, quickly learning the language of the natives.
  • Empty Eyes: After his Heroic BSoD, Belaf's eyes became dull and lifeless.
  • Morphic Resonance: The crown-like horns on his head resemble the thick, spiky hair he had when he was human.
  • My God, What Have I Done?: The only expedition member besides Vueroeruko to outwardly feel regret about eating Irumyuui's children to cure the larvae that they were infected with. His current form is atonement.
  • Too Many Mouths: Those horizontal slits he has right below his forehead? Not his eyes. They are two tiny mouths. His speech bubbles imply he alternates between the two of them when he speaks.
  • Took a Level in Cynic: As the Flashback Arc reveals, Belaf wasn't always a cold-hearted person who barters with human body parts and buys himself an immortal girl just so he can devour her fluids over and over again. He was once a righteous young man, but the horrors he faced in the Abyss and the things he was forced to do to survive broke him hard.
  • What Beautiful Eyes!: As a human, Belaf had striking, clear eyes.

    Juroimoh 

One of the Three Sages that rule Iruburu. Juroimoh is an avid fighter, and rushes to defend the village from outside threats.


  • Blood Knight: He values an honest fight, and is the only Sage to battle the Fuzosheppu.
  • Phallic Weapon: His sword, a dripping, meaty-looking rod that he usually keeps sheated inside his body.

    Irumyuui 
An abandoned child Vueroeruko found on her journey, whom the woman adopted as her surrogate daughter.
  • Body Horror: Between the tainted water and the wish-granting egg(s), her body was warped into something horrific in Chapter 50. And it got even worse in Chapter 51 when it revealed that Irumyuui is the village itself.
  • The Exile: She was exiled by her original human(?) tribe, with a back tattoo that roughly translates to “Rejected. Bad breeding stock.”
  • Explosive Breeder: Her wish granted by the Cradle of Greed turned her into a horribly malformed one that can spawn enough infants to sustain an entire delving troupe. Unfortunately, the babies she birthed were of the trial-and-error variety, meaning none of them could last for more than a day before expiring, and she stopped since turning into Iruburu... that is, until she produced her final child.
  • Forgotten Fallen Friend: Averted, as Veuko explicitly said that the one thing she wanted the most was not to forget Irumyuui.
  • Happily Adopted: Vueko became Irumyuui's mother upon finding the girl, even if they don't call each other that, and was the sole person who still cared for her after hundreds of years.
  • I Have No Son!: Her biological mother did this to her. As the only daughter she was expected to be able to have a child, but since she couldn't they exiled her and marked her as a sacrifice for the abyss.
  • Improbable Antidote: Her children's meat, for whatever reason (Wazukyan theorized it was the freshness and vitality within), turned out to be the key to curing the petrification disease ravaging the Ganja Corps. It put a strain on the mentality of almost everyone involved, obviously.
  • It Was a Gift: The necklace she wears was a gift from Vueko, made from the remains of a pet she had that got eaten by a creature of the abyss.
  • Mama Bear: She loves all of her children even if they didn't have a chance to live in the first place, nor did they show any signs of being sentient. And Faputa, her final child, is the manifestation of her rage toward what had been done to all of her other children.
  • Mood Whiplash: When she tells Vueko the reason she feels comfortable with her. “You smell like my mother.” “...someone who has slept with a lot of people.”
  • Please Don't Leave Me: Begs Vueko never to leave or abandon her. And Vueko kept that promise even after everything.
  • Truly Single Parent: After being given a Cradle of Greed, the relic merges into Irumyuui's body and she starts expelling strange little critters from a hole in her chest, which she refers to as her "babies". Though initially small and unable to survive, the creatures get larger and more complex as the egg keeps mutating Irumyuui's body, with her youngest child Faputa being sapient and seemingly immortal.
  • Worse with Context: “I was loved by all my brothers.” Sounds like a nice family? Wrong! Her mom was effectively a breeding machine. Iruymuui herself has a tattoo that pretty much labels her “unfit to bear children.” Then they all shunned her.

Others

    Marulk 
https://static.tvtropes.org/pmwiki/pub/images/malruk_2.png
Voiced by: Aki Toyosaki (Japanese), Kelley Peters (English)

Ozen's assistant at the Seeker Camp. He (yes, he) essentially lives there because the Abyss has made his skin extremely sensitive to sunlight. Marulk is demure and extremely polite, a sharp contrast to his callous master and teacher.


  • Dragged into Drag: It's heavily implied that Marulk is a boy who is forced to crossdress as maid by Ozen.
  • Improbable Age: Normally, someone as young as Marulk wouldn't be allowed to become a Blue Whiste and stay at the Seeker Camp. They made an exception for him because he fell into the second layer in a spelunking accident, and then Ozen took him under her wing.
  • Innocent Blue Eyes: He has clear blue eyes and is a kind and polite kid.
  • Meido: He usually dresses like one, with a frilly headband and a puffy skirt with an apron. His duties also include welcoming Ozen's guests, lowering the elevator for them, and guiding them through the Seeker Camp.
  • Nice Guy: Marulk is one of the manga's kindest characters and tries to be as helpful as possible when Reg and Riko visit the Camp.
  • Oh, Crap!: Has one that’s heart wrenching to watch when Ozen proceeds to curb stomp Reg, after implying its a fight to the death.
  • Tiny Guy, Huge Girl: Marulk is a tiny dude in a dress, and Ozen is a female power house with a “I will break you” attitude.
  • Weakened by the Light: He can't come up from the 2nd layer to the surface because he is sensitive to light.
  • Wholesome Crossdresser: He dresses like a girl, and he is one of the sweetest people you'll meet in the Abyss.

    Mitty 
https://static.tvtropes.org/pmwiki/pub/images/mitty_22.png
Back when she was human 
Voiced by: Eri Kitamura (Japanese), Monica Rial (English)

A Hollow who lives with Nanachi in the Cup of Giants. Unlike Nanachi, her transformation reduced her to a grotesque blob of immortal flesh, and she doesn't show any indication of having a human mind. Despite her monstrous appearance she has a sweet temperament and is clearly attached to Nanachi.


  • And I Must Scream: Thanks to Bondrewd's experiments, she was reduced to an immortal blob of flesh that regenerates every time she is injured. While she's lost all of her intelligence and seems only barely sentient anymore, it's heavily implied that some part of her consciousness remains trapped inside.
  • Blob Monster: A blob of fluffy pink flesh with one eye and two claws, to be precise.
  • Body Horror: Her transformation. The poor girl basically melts into her current form, all while she screams and begs for someone to kill her and make the pain stop. As if that isn't enough, Bondrewd later tests her durability by deliberately hurting and mutilating her.
  • Eye Scream: Her left eye was permanently damaged by Bondrewd using the Sparagmos. This is the first sign that she can be killed using something similar to the Sparagmos. For instance, Reg's Incinerator.
  • Healing Factor: Suffering from the Curse in double causes her to regenerate from all injuries, leaving her completely helpless yet nearly unkillable. However, every time she regenerates, her form becomes more and more twisted. Being hit by a weapon capable of disintegrating her cells utterly hampers this regeneration.
  • Hope Spot: She’s still alive in Iruburu Village. While the 2nd Mitty is a clone, a brief interaction between her and Reg suggests its the same Mitty, and not a copy. This would mean the village’s clone mechanic did something similar to what Bondrewd did with his foot soldiers.
  • Mercy Kill: Is given one by Reg at Nanachi's request, incinerating her so thoroughly that she couldn't regenerate, thus liberating her soul.
  • Opening a Can of Clones: There is a copy of Mitty residing within Iruburu Village, under possession by one of the Three Sages. She differentiates from the original by the lack of a missing eye, but as far as Belaf is concerned, she is identical in body and soul. Nanachi breaks down upon seeing her, and Riko confirms for herself that, yes, this Mitty's just as real as the genuine article. Besides that, it raises questions on just how damn powerful "The Balancing" could possibly be to pull this feat off. Made even more horrifying by the fact that Belaf used over half of his body as collateral for The Balancing to create the Mitty clone.
  • Was Once a Man: She used to be a human girl. She was forced to ascend from the Sixth Layer, and the Abyss' curse mutated her into what she is today.

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