Fels

Name: Fels

Gender: Male

Age: 800+

Race: Unknown (formerly human; currently an undead skeleton)

Affiliation: Guild (secret agent of Uranus)

Occupation: Mage / Sage / Magical engineer / Xenos liaison

Level: 4

Voice Actor (anime): Mikako Komatsu

Fels is a secret mage who serves Uranus, the god who leads the Guild in Orario.

Most Guild employees do not know he exists; occasional sightings have led to rumors of a “ghost” haunting Guild Headquarters.

Hundreds of years ago, Fels was the highest‑ranked mage of the magic nation Altena.

By mastering the rare ability Mystery more thoroughly than anyone else in recorded history, he became the only person to successfully create the Philosopher’s Stone, an item that grants eternal life.

The price of his obsession, however, was his own body.

A failed “immortality ritual” stripped him of flesh and skin, leaving only a living skeleton, after which he abandoned his title of “sage” and chose the name Fels, meaning “fool.”

In the present era, he acts as Uranus’s unseen right arm.

He handles secret operations that cannot be made public and serves as principal contact and handler for the Xenos, the monsters who possess intelligence and emotions.

On first impression, Fels appears eerie: a robed figure whose face and even gender cannot be seen, radiating an ominous air.

Underneath, though, he is surprisingly human, pragmatic, and often kind, with a dry sense of humor.

He is capable of silliness and lighthearted banter, especially in side stories and events, leading fans to describe him as a character who can handle comedy, snark, and serious drama in equal measure.

Despite his undead form, he is quite insecure about being “just bones,” frequently shouting “Don’t call me bones!” whenever someone refers to him that way, yet occasionally making self‑deprecating skeleton jokes himself.

Once known as a “sage,” Fels is extremely intelligent and deeply knowledgeable about the Dungeon, on a level comparable to the gods.

He is adept at deception, wordplay, and verbal sparring, and he can think on his feet even in chaotic situations.

However, he is more of a “civil official” than a battlefield commander.

His talent lies in research, magic, and planning rather than in frontline tactics or squad leadership.

Because he has witnessed countless lives and tragedies over eight centuries, he has developed a distinctive philosophy about heroism.

He believes that those who are derided as “hypocrites” for acting on their beliefs—people whose selfless acts are misunderstood as selfish or self‑satisfying—are the ones truly qualified to be heroes.

In his view, such a “hypocrite” is not someone doing good for shallow self‑interest, but someone like Bell Cranel: a person who follows his own convictions, is scorned and misunderstood for it, but continues anyway.

This belief leads Fels to tell Bell, “Hypocrites are the ones who have the right to become heroes. Please, you alone must remain a fool.”

Fels is wrapped from head to toe in black robes, gloves, and hood, concealing any clue to his original appearance or gender.

Beneath the robes is nothing but a skeleton—no flesh, no skin, only magically animated bones.

This skeletal form is the result of his own failed immortality experiment.

Seeking unlimited knowledge and eternal life, he devised an “immortality secret technique” that erased his lifespan but rotted away his body.

Realizing the depth of his arrogance and foolishness, he took the name Fels, “the fool,” as a constant reminder of his error.

He has no visible eyes or face, yet he moves, speaks, and expresses emotion as naturally as a living person.

Uranus

Uranus is Fels’s current patron god and the de facto “chief” of the Guild.

They have been working together for centuries, built on mutual trust and a shared long‑term vision for Orario and the world.

Uranus entrusts Fels with delicate tasks, secret projects, and the overall management and protection of the Xenos.

Fels in turn serves as Uranus’s eyes, hands, and negotiator in the shadows.

The Xenos (Lido, Gros, Rei, Wiene, Marie, Asterius and others)

The Xenos are intelligent, emotional monsters who desire peaceful coexistence with humans.

Initially, Fels approached them only because Uranus ordered him to, interacting with them reluctantly.

Over time, he grew to genuinely care for them and now considers them precious friends.

He sympathizes with their dream of coexistence and dedicates his work to making that impossible‑sounding future a reality.

He acts as their guardian, strategist, healer, and liaison to the surface.

During multiple crises, he risks himself to protect them, and the Xenos, in turn, trust him deeply.

Bell Cranel

Fels meets Bell Cranel during the Xenos incident, when Bell chooses to protect Wiene, an intelligent dragon girl, despite the consequences.

Witnessing Bell repeatedly injure himself and be vilified by the city while stubbornly guarding his convictions, Fels develops immense trust and hope in him.

When Bell is tormented by accusations of “hypocrisy,” Fels shares his core belief that those labeled “hypocrites” are the ones who can become true heroes.

He urges Bell to remain a “fool” who follows his own heart, a conversation that has a profound impact on Bell’s growth.

After the Xenos conflict, Fels tells Bell that to truly achieve coexistence between humans and the Xenos, conquering the deepest, unknown bottom of the Dungeon is necessary.

He hints that the Dungeon’s lowest level holds a “fulfilled covenant” and “a final settlement,” giving Bell both a goal and a reason to keep fighting.

Ultimately, Fels and Uranus decide to bet everything on Bell Cranel’s potential.

They see him as the one who might overturn both divine schemes and mortal hatred.

Other Key Connections

Rei, Lido, Marie, Asterius and other Xenos: comrades and close allies whom Fels helps to hide, heal, and coordinate during operations.

Hermes: another god who knows about the Xenos and pretends to cooperate, but secretly dismisses coexistence as fantasy and manipulates them into “necessary sacrifices” for his own “heroic” scenario for Bell.

Fels is furious with Hermes for exploiting the Xenos yet chooses to trust Bell to defy Hermes’s plans.

Finn Deimne: Fels collaborates with Finn during the Knossos expeditions and later large‑scale operations, recognizing Finn’s strategic genius and offering his magic tools and expertise.

Asfi Al Andromeda: a leading magical tool creator in Orario who is astonished by Fels’s inventions such as the Oculus, acknowledging that his work surpasses her own.

Naaza Erisuis: uses Fels’s illusionary flower magic tool during the Xenos return operation, coordinated by Fels.

Early Appearances and Guild Work

Fels acts mostly behind the scenes.

In the *Sword Oratoria* side story, he quietly asks Ais Wallenstein to investigate a disturbance in the food storage on the 24th floor of the Dungeon.

Within the main story, he operates as Uranus’s agent.

He handles information about the Dungeon that is hidden even from most gods and adventurers and carries out covert missions related to the Xenos.

Xenos Arc

During the Xenos incident (main story volume 9 and onward), Fels serves as the bridge between the Guild, Uranus, the Xenos, and Bell.

He abducts Hestia from her familia home—more or less forcibly—to bring her before Uranus and make her aware of the Xenos’s existence.

While Hestia meets Uranus, Fels goes to the Xenos hidden settlement.

There, he explains the nature of the Xenos and their situation to Bell and his companions, who have been sheltering Wiene.

When members of the Ikeros Familia slaughter Xenos like Lanye and kidnap Wiene, the surviving Xenos go berserk and attack the 18th floor’s Rivira town.

Fels, together with Bell and a disguised Xenos hunting party, infiltrates the Ikeros Familia base and enters Knossos, the man‑made labyrinth that serves as a secret second entrance to the Dungeon.

As the chaos spills across Orario and a Guild‑sanctioned extermination force forms—led largely by the Ganesha Familia—Fels races alongside the Hestia Familia to try to resolve the crisis with minimal bloodshed.

However, in the battle on Daedalus Street, he is inadvertently maneuvered by Hermes’s scheme, which drives the Xenos into a desperate corner.

Hermes, despite publicly supporting coexistence, never truly believed in it.

He instead engineered a scenario in which the Xenos would be sacrificed to forge Bell into a “crafted hero” molded by divine will.

Fels, enraged by Hermes’s manipulation and willingness to demand “sacrifice” from those who only wanted peace, confronts him emotionally and morally.

At the same time, he chooses to believe that Bell will defy divine expectations and act on his own choice.

That trust is rewarded.

Bell continues to protect the Xenos against impossible odds, culminating in his duel with Asterius, a fight that symbolically overturns the malice and schemes surrounding the incident.

After the dust settles, Fels regrets that the dream of human–Xenos coexistence seems to have receded.

Yet he also sees new hope: Bell proved he would fight the entire city if necessary to defend the Xenos.

Shortly afterward, Fels meets Bell and tells him bluntly that without conquering the very bottom of the Dungeon, coexistence is impossible.

When Bell asks what lies at the Dungeon’s lowest level, Fels replies with a cryptic answer: “A bond fulfilled… and a final decision.”

Knossos Expeditions and Later Actions

After the Xenos incident, Finn proposes a full‑scale assault on Knossos, seeking Fels’s cooperation.

Fels agrees, and with this, Uranus and Loki also establish an alliance regarding Knossos.

Fels leads the Xenos as a strike force from the 18th floor, supporting the human adventurers.

During the “second advance” into Knossos, when each team faces copies of six powerful spirits, Finn sends Fels ahead alone.

Using his mastery of mystical circuits, Fels destroys the magical circuitry of the labyrinth’s altar that powers the barriers.

This allows the rear units to advance and prevents Knossos from isolating and annihilating the adventurers piecemeal.

Later, as the “Academy” expedition group returns and Guild official Royman promotes a massive “shaft project” to build large transport channels in the Dungeon, Uranus approves the plan.

Fels warns Uranus that indulging Royman’s ambitions may cause problems, showing his continued role as a cautious adviser.

He also begins converting the captured Knossos into his own magical workshop.

There he works on new magic tools and prepares infrastructure for future large‑scale Dungeon operations.

Orario Games and Deep Dungeon Operations

During the “City Competitive Festival” (Orariapic), while the Loki Familia leads a coalition expedition, Fels observes the mission through Oculus devices he distributed to Finn and his companions.

Alongside Uranus, he watches their progress and collects data on the 60th floor, which has become a “demonic realm” due to corrupted spirits.

In the subsequent rescue operation for the Loki Familia, Fels serves both in the “defense team” and the “main force.”

With the help of Xenos still hidden in the city, he transports and installs large amounts of his magic tools along the Dungeon’s official routes.

As adventurers construct a “pseudo shaft” to enable rapid, repeated travel to and from the deep floors, Fels deploys his golems and healing‑field spheres around them.

These tools shield the workers and fighters from constant monster assaults and attrition.

Later, Fels heads to the Thousand Azure Garden—a frozen battlefield in the deep floors—together with Rei.

There he joins the “backline” against the slaughtering spirit queen, fighting as the “last healer” and focusing on keeping key fighters alive with his superior healing magic.

Astrée Record Era (Seven Years Earlier)

In the *Astrée Record* storyline, which takes place seven years before the main series during the war against the dark faction, Fels is already working tirelessly from the shadows.

He acts almost without rest, secretly annihilating dark faction cells and continuously healing injured adventurers and citizens across Orario.

He stays entirely out of the public eye, leaving almost no trace of his efforts.

Even then, he is a silent guardian rather than a front‑line hero, shaping the battlefield through support and information.

Fels is a rear‑guard mage who relies primarily on magic and magic tools.

However, as a level 4, he can physically overpower most average adventurers even without spells or gadgets.

He has mastered parallel chanting, allowing him to move and sometimes fight while casting complex spells.

This also makes him an unparalleled combat medic, capable of healing companions without forcing them to stop advancing.

His true strength lies in his mind and his development of the Mystery and Magecraft (Magic) development abilities.

Through these abilities, he can create extraordinary magic tools, some of which rival or surpass divine miracles.

Although he was once capable of further growth, his skeletal body has no flesh on the back where the divine Falna is inscribed.

As a result, his status can no longer be updated, making his current level and stats permanently fixed.

Even so, within the bounds of level 4, he is one of the most formidable support mages and magical engineers in Orario’s history.

His influence is felt far beyond what his visible combat strength would suggest.

Level: 4

Attributes (Strength, Endurance, Dexterity, Agility, Magic): Exact values unknown

Fels’s parameters are frozen since he lost the flesh where his Falna is engraved.

He cannot receive updates, so his status will never increase, but he continues to refine his techniques and tools.

Mystery

Mystery is a rare development ability that allows its bearer to invoke quasi‑miraculous effects and create magic tools that border on divine miracles.

Fels is said to have mastered Mystery more completely than any individual in history.

Thanks to this, he has created numerous powerful magic items and even succeeded in producing the legendary Philosopher’s Stone, which grants eternal life.

This feat alone places him among the greatest magical researchers of the age.

Magecraft (Magic)

Magecraft enhances the effect and efficiency of spells.

Fels has also raised this ability to its highest rank.

As a result, his magic is so potent that others refer to it as “miraculous.”

Spells that would be great achievements in anyone else’s hands become routine tools for him.

Dia Panakeia

Chant:

“Staff of Pios, mother light of Pione.

By the authority of healing, unite and cure all.”

Dia Panakeia is an all‑healing magic.

It fully restores fatigue, injuries, and even curses and maledictions.

Within the setting, it is considered one of the absolute top‑tier healing spells.

Its scope and power surpass standard healing magic, making Fels a near‑miraculous healer.

Dia Orpheus

Chant (abridged, translated):

“Uncharted domain, forbidden wall.

On this day, I defy the law of heaven.

Staff of Pios, chalice of Sals.

Voice that even the authority of healing cannot reach, please, wait for me.

Judgment of the king, thunderbolt of condemnation.

If I am to be burned for opposing the providence of the Lord, I shall go to the underworld of my own accord.

Open, Gate of Charon, cross the river of the underworld of time.

Hear me, underworld king, this maddening supplication.

Unending tears, scattered wails.

The price has already been paid.

Road of light.

With the predetermined past as a sacrifice, illuminate this foolish wish.

Ah, I will not look back.”

Dia Orpheus is a resurrection magic that can revive the dead at the cost of all of Fels’s magic power.

It blatantly defies the natural order of the lower world.

Despite its terrifying concept, the spell’s success rate is extremely low.

For 800 years, Fels never once managed a successful resurrection and came to resent the spell as a wasted magic slot.

That changes when he uses Dia Orpheus on Wiene.

For the first time, the spell succeeds, and he resurrects her, prompting a quiet, emotional remark: “So it did have meaning after all.”

Some in‑world theories suggest that the success might be related to Bell’s development ability Luck, implying that Bell’s presence may have helped tilt the impossible odds.

Whatever the cause, Dia Orpheus finally fulfills its role, echoing its mythic origin and the spell’s final line: “I will not look back,” a deliberate contrast to Orpheus’s failure in Greek myth.

Fels’s magic tools are among the finest in Orario, often beyond what other craftsmen can comprehend.

Even Asfi Al Andromeda, widely regarded as a top magic tool artisan, admits that his creations shock her.

Below are his most notable inventions.

Magic Eater (Magic Eater Gauntlet)

This is Fels’s main offensive magic tool, a gauntlet that fires shockwaves by consuming magic power as ammunition.

It requires no chanting, offering fast, responsive attacks similar in function to Bell’s rapid‑fire spell “Firebolt.”

However, unlike Bell’s spell, the Magic Eater is very inefficient and consumes large amounts of magic power.

It is best used by someone like Fels, who has deep magic reserves and uses it sparingly for bursts of power.

Reverse Veil

Reverse Veil is a cloak that grants invisibility.

Unlike Asfi’s Hades Head, which makes the wearer invisible as long as it is worn, Reverse Veil is reversible: it has a normal side and an invisible side that the wearer can toggle between.

This makes it more flexible and user‑friendly.

However, it only hides the wearer’s appearance and does not erase sound, smell, or presence.

As a result, extremely skilled adventurers—especially beastmen with keen senses—can still detect an invisible wearer.

For complete stealth against top‑tier foes, Fels combines Reverse Veil with other tools to dampen sound and scent.

Black Mist

Black Mist is a type of smoke bomb.

When broken, it releases thick black smoke that blinds vision and clings to targets.

The smoke’s density is such that even first‑class adventurers struggle to precisely locate enemies within it.

Fels uses Black Mist both to rescue the Xenos from the Loki Familia and during the Daedalus Street battle to obscure positions and movements.

Phantom Flower

Phantom Flower is a pair of blue and red flower petals that cause hallucinations.

Those who inhale its pollen see illusions of objects recorded in the flower before use.

The illusions are highly effective against lower‑level adventurers and those without resistance.

However, anyone with the development ability Abnormal Resistance can shrug off the effect.

During the Xenos return operation, Naaza Erisuis uses Phantom Flower to show illusions to selected targets.

By focusing on those without Abnormal Resistance, she helps disrupt pursuing adventurers and supports the Xenos’s escape.

Seeker Powder

Seeker Powder is a white powder stored in a large vial.

When blood is dripped into it, the powder turns red.

Sprinkling this powder over a map reveals the name and location of the person whose blood was used.

However, it only works with maps personally created by Fels.

For the Xenos return operation, Fels painstakingly walks the entire Daedalus Street district to create a detailed map called the “Daedalus Legacy.”

He then gives this map and a vial of Seeker Powder to Hestia, enabling her group to track allies in the maze‑like streets.

Oculus

Oculus is a pair of twin crystals small enough to fit in one’s palm.

Whatever image and sound one crystal receives is transmitted to its partner, enabling long‑range two‑way visual and audio communication.

In the story, Oculus is the only known magic item capable of true long‑distance communication.

Its utility makes it invaluable for coordinating large expeditions, and Fels uses it extensively to monitor operations such as the deep floor expeditions.

Asfi, upon learning of Oculus, is so excited that she feels her blood race, acknowledging it as a masterpiece.

Oculus becomes one of Fels’s most iconic inventions.

Golems (Puppet Soldiers)

These are hulking, nearly 3‑meter‑tall warrior constructs made entirely of adamantite, an extremely hard metal.

They can be controlled remotely by Fels via a short staff that channels his magic, or they can operate on simple autonomous commands.

Their durability is extraordinary; even first‑class adventurers struggle to destroy them.

The cost, materials, and craftsmanship are so extreme that each golem requires more than 1 billion valis to build.

Fels considers them one of his life’s greatest achievements.

He originally planned to keep them as secret trump cards.

After the Monsterphilia incident, he deploys some of these golems to guard the sewers beneath the city.

When the Xenos face annihilation by the Loki Familia, he finally sends them into battle, visibly excited to unleash his greatest creations.

To his horror, Tiona Hiryute, a level 6 Amazoness, slices a golem apart in a single strike.

Fels is left stunned and laughing emptily as he realizes just how monstrous first‑class adventurers truly are, watching his masterpiece destroyed like a toy.

He later uses golems again in the deep floor rescue operations.

This time, they serve more as mobile shields and support units rather than main weapons.

The Story of the “Sage” and the Philosopher’s Stone

Fels’s former patron god in Altena was a capricious, cruel deity who treated his followers as toys.

After Fels finally succeeded in creating the Philosopher’s Stone, his god shattered it right in front of him.

The god laughed so hard at Fels’s devastation that his sides hurt.

This story survives to the present day as a “sage’s folktale” with a famously unsatisfying punchline.

In the main series, Eina Tulle recounts this old story to Bell Cranel in volume 2.

At that time, neither of them realizes that the “sage” in the legend is actually the very real, very bitter Fels still walking around Orario.

Gender Speculation and Fan Theories

Because Fels’s body is nothing but bones and is always hidden under robes, his gender seems ambiguous to many characters and readers.

Several hints led to speculation that Fels might secretly be female, such as:

A slightly feminine nuance in his internal monologue in some scenes.

His voice actor being Mikako Komatsu, a woman.

The password for his magic tool storage referring to an “Altena cat dreaming of immortality,” with black cats often associated with witches’ familiars.

A game event (“Nightmare School Life”) where, due to a powerful barrier, Fels appears as a young girl, though officially this form is said not to be his actual childhood self.

In this entry, Fels is treated as male, but the series intentionally plays with ambiguity for humor and mystery.

The fandom often debates this point with a mix of serious analysis and jokes.

Mythic Inspiration: Orpheus

Fels’s resurrection spell Dia Orpheus is clearly inspired by Orpheus from Greek mythology.

In the myth, Orpheus descends to the underworld to reclaim his dead wife.

The underworld god grants her return under one condition: Orpheus must not look back at her until they have fully left the underworld.

Overcome by doubt, Orpheus looks back just before they reach the surface, causing her to vanish forever.

The chant of Dia Orpheus echoes this story: pleading with the underworld, accepting judgment, and staking everything on one forbidden wish.

The final line, “Ah, I will not look back,” explicitly declares Fels’s determination not to repeat Orpheus’s error.

Fels’s long history of failure with the spell parallels Orpheus’s tragic attempt.

The eventual success with Wiene serves as a poignant inversion of the myth: a “fool” who finally manages to defy fate, however narrowly.