Dino

Dino is one of the Eight Star Demon Lords, and the sixth to assume the title as a second-generation Demon Lord.

He is also called the "Wandering King" and the "King of the Sleeping Forest," but in practical terms he is a battle-hardened former seraph who lives like a complete NEET.

Once, Dino was a seraph among the Primordial Seven Angels serving the Star King Dragon Veldanava.

On Veldanava’s orders he remained on the surface world as a watcher to maintain stability, but later became one of three angels who fell and turned into a fallen race.

His outward appearance is that of a high-school-aged young man with dark purple hair streaked with silver and perpetually sleepy eyes.

Despite his languid look, he is among the strongest sword users in the world and possesses multiple ultimate skills.

Dino first meets Rimuru Tempest at the Walpurgis banquet of the Demon Lords (around volume 6 of the light novel).

By volume 11, after being kicked out by Dagruel, he transfers to Rimuru’s nation on Guy Crimson’s recommendation and starts living there under Rimuru’s protection.

Though he claims a “philosophy of not working,” he eventually takes a job in Ramiris’s labyrinth, gradually starts to enjoy the work, and even develops some camaraderie with the others.

However, in volume 16 he betrays Rimuru by attempting to abduct Ramiris, only to be defeated by the awakened Zegion and branded, though he narrowly escapes by reviving outside the labyrinth.

His "betrayal" stems from the compulsion of his angel-type ultimate skill: because he possesses a heavenly-type ultimate ability, he cannot ultimately resist a command from Feldwey, who uses the power of "King of Justice."

Initially Dino follows Feldwey with a relaxed, almost optimistic attitude, seeing him as an old colleague, but as Feldwey frees the sealed Fen and plots to use Milim Nava—Veldanava’s daughter—merely as bait for Veldanava’s resurrection, Dino realizes the depth of Feldwey’s madness and begins to deeply regret ever siding with him.

Name: Dino

Gender: Male

Race: Seraph (initially) → Fallen (fallen angel/demon race)

Status: One of the Eight Star Demon Lords (second generation, sixth to ascend)

Titles: Sleeping Ruler, Wandering King, King of the Sleeping Forest, Former member of the Primordial Seven Angels

Affiliation: Initially Veldanava’s faction; later a Demon Lord with loose affiliation; stays in Rimuru Tempest’s country for a time; later under Feldwey’s influence

Combat Power: EP 2,260,000 (+ 2,200,000 from the divine greatsword “Fang of Ruin”)

Ultimate Skills (various versions):

Heavenly-type: King of the Heavens (Astarte)

Sin-type (demonic): King of Sloth (Belphegor)

Fallen King (Lucifer) – web version

Fallen King (Astaroth) – later fusion form

Former Position: One of the Primordial Seven Angels, Veldanava’s sword and close aide

Voice Actor (anime): Yusuke Kobayashi

Dino’s core credo is “living without working,” and he treats that laziness as a kind of personal aesthetic.

For several hundred years, he has neither earned his own money nor paid for his own food and drink.

When he crashes Rimuru Tempest’s nation and essentially says, “Please take care of me,” Rimuru instantly pegs him as the type to say, “I absolutely refuse to work.”

Despite this, when Dino actually decides to do something, he moves quickly and efficiently, proving that he is not incapable—he simply does not want to exert himself.

This is why Dino is regarded as the “Demon Lord of Sloth.”

His attitude can be described as frank and easygoing at best, and light or flaky at worst.

He is socially adept and has no problem talking casually with seemingly stiff people like Dagruel or Luminous Valentine.

In practice, Luminous Valentine gives him little more than a cold glance, but Dino remains unfazed.

He has a teasing, almost big-brother-like relationship with Ramiris, casually mocking her short stature even at the formal Demon Lords’ banquet.

He is often seen sleeping no matter the situation, to the point where Rimuru is honestly exasperated by how often he dozes off.

Although he looks like a normal, handsome teenager when his face is neutral, his constantly lazy expression and half-lidded eyes ruin the impression of a classic pretty boy.

He dresses relatively lightly compared to other Demon Lords, with two swords at his waist and an outfit that makes him look more like a hero or adventurer than a fearsome Demon Lord.

His eyes are light blue, and his hair is a nearly black shade of purple with silver streaks running through it.

In the anime adaptation, this is inverted visually to silver hair with purple highlights.

Behind the lazy exterior, Dino is clever and quite good at scheming.

In the spin-off "The Ways of the Monster Nation," he runs multiple shady side businesses in Rimuru’s country and makes a small fortune off the black market.

In one scheme, he secretly establishes an unofficial fan club for Shuna and Shion and profits by selling high-priced candid photos of them.

In a second, more outrageous operation, he produces Veldora Tempest as a masked fighter in an underground arena, running unsanctioned tournaments and pocketing the profits.

The first time, he manages to hide his identity and slip away unscathed.

The second time, the stunt is too flashy, and Rimuru uncovers the whole affair; during questioning Dino accidentally reveals the earlier photo racket as well, leading to a thorough and painful scolding session from Rimuru, Shuna, and Shion.

Even so, Dino is not malicious by nature.

He is more of a lazy, opportunistic older guy who wants an easy life and occasionally lets his pragmatism and mischief go too far.

Dino is primarily a swordsman, and his swordsmanship is often described as the strongest in "That Time I Got Reincarnated as a Slime."

His skill surpasses elite fighters like Albert and GraSword, and he was once known across the world as its greatest swordsman.

General Fighting Style

At first, Dino commonly wields the myth-class greatsword "Fang of Ruin" in battle.

However, this “brute-force greatsword style” is actually a temporary, simplified combat mode.

When Dino becomes truly serious, he performs Life Apotheosis—temporarily housing divine power in his body—to remove the restrictions on acting on the surface world.

In this fully unleashed state, he uses a pair of myth-class sacred and demonic swords forged from a Star Core: the golden holy sword Excalibur and the dark-silver magic sword Caliburn.

His movements and strikes combine both holy and demonic aspects, reflecting his history as a former seraph turned fallen being.

Even without relying heavily on skills, his swordsmanship alone is terrifyingly deadly.

Unique Skill: Sloth

Dino’s primary unique skill in his “lazy Demon Lord” period is the sin-type unique skill "Sloth."

The more he avoids moving, the more powerful the skill becomes, making his habitual idleness synergize with his combat style.

Sloth can forcibly induce sleep in targets, pulling them into an irresistible drowsiness.

He can also apply the concept of Sloth to sword techniques that cause cognitive disruption, making enemies fail to notice or properly perceive his attacks.

This leads to deceptive styles where opponents suddenly find themselves collapsing into sleep or missing vital strikes without understanding how they were hit.

Because the skill is stronger the less he exerts himself, Dino tends to fight with minimal movements and efficient, precise sword strokes.

Ultimate Skills

King of the Heavens (Astarte)

King of the Heavens (Astarte) is Dino’s heavenly-type ultimate skill and serves as his trump card.

The core authority of this skill is "Creative Evolution," which allows Dino to evolve his own skills in the direction he desires.

Using Creative Evolution, Dino upgrades his unique skill Sloth into the ultimate skill King of Sloth (Belphegor).

This is the power Veldanava originally entrusted to him, making Dino highly valued for both his creative and destructive potential.

King of Sloth (Belphegor)

King of Sloth (Belphegor) is a sin-type demonic ultimate skill derived from Sloth through Astarte’s Creative Evolution.

Its defining feature is that the more Dino moves, the weaker its effects become.

Used properly, Belphegor excels at large-scale spiritual interference.

With techniques like "Temptation to Ruin," Dino can put a vast number of enemies into eternal sleep, effectively removing them from the battlefield.

However, Belphegor’s true nature is to amplify and coordinate the power of allies, shining most when used for support.

Dino fails to fully grasp this cooperative focus and thus never truly draws out Belphegor’s full potential in his earlier battles.

Fallen King (Lucifer) – Web Version

In the web version continuity, Dino’s heavenly skill eventually transforms into the ultimate skill Fallen King (Lucifer).

This power mixes aspects of Guy Crimson’s King of Pride (Lucifer) and Milim Nava’s King of Wrath (Sataniel), though Dino’s version is ultimately inferior to either of theirs in raw dominance.

The awakening of this skill is tightly connected to his grief and rage after Veldanava and his wife Lucia are slain.

Fueled by wrath, Dino uses this power to annihilate the nation responsible for their deaths and nearly plunges the world into additional disaster.

Fallen King (Astaroth)

To free himself from Feldwey’s domination, Dino eventually uses Creative Evolution once more.

He fuses King of the Heavens (Astarte) and King of Sloth (Belphegor), resulting in the overwhelmingly powerful ultimate skill Fallen King (Astaroth).

Fallen King (Astaroth) retains Astarte’s creative and destructive capabilities while incorporating Belphegor’s overwhelming advantage in mental and spiritual interference.

This combined skill grants Dino immense power over both creation and destruction, and near-absolute superiority in manipulating and suppressing minds.

It is this ultimate evolution that finally allows Dino to break free from Feldwey’s control, as he asserts his own will over the spiritual chains binding him.

In essence, Astaroth represents Dino’s full potential realized: a fallen angel who commands both divine creation and demonic sloth.

Named Techniques

Dino’s skills are expressed through several named abilities and sword techniques:

Creative Evolution (Evolution):

The authority within King of the Heavens (Astarte) that lets Dino transform his existing skills into stronger forms of his choosing.

This is how Sloth became King of Sloth (Belphegor) and, later, how his ultimate skills were fused into Fallen King (Astaroth).

Heaven-Demon Twin Strike Overlord (Fallen Crusade):

A dual-blade technique that merges holy and demonic power, often employed with Excalibur and Caliburn.

It represents Dino’s dual nature as both former angel and fallen being.

Slothful Sleep (Fallen Hypno):

A technique that puts enemies into an unnatural, forced sleep.

Targets often collapse without realizing they were attacked, making it ideal for ambush and crowd control.

Temptation to Ruin (Fallen Catastrophe):

A large-scale application of King of Sloth (Belphegor) that induces everlasting sleep across a wide area.

This can neutralize entire armies or regions if used without restraint.

Hypnosis to Death (Fallen Thanatos):

A deadly hypnotic attack that guides the target’s mind directly toward death.

It combines sleep, mental domination, and lethal spiritual damage.

Fallen Strike (Fallen Strike):

A direct offensive sword technique infused with fallen-angel power.

It concentrates Dino’s divine and demonic energy into a single devastating blow.

Dino’s first meeting with Rimuru Tempest occurs at the Walpurgis banquet of the Demon Lords.

He appears there as one of the Eight Star Demon Lords, and even in this formal setting he is lazy enough to be found sleeping at every possible opportunity.

Later, Dino is expelled from Dagruel’s domain, though the reasons are tied to his attitude and the shifting politics among the Demon Lords.

On Guy Crimson’s recommendation, he then shows up in Rimuru’s nation and casually imposes on Rimuru for food, shelter, and general life support.

Rimuru, suspicious of Dino’s freeloading nature but recognizing his strength, allows him to stay under observation.

Dino ends up working in Ramiris’s Labyrinth (the massive dungeon under Rimuru’s control), where he begrudgingly contributes and begins to feel a sense of teamwork with the others.

Despite his outward indifference, Dino slowly forms bonds with people in the labyrinth, such as Beretta, Apito, and the various labyrinth residents.

His “lazy coworker” act slowly turns into genuine participation, even if he grumbles the whole time.

In volume 16, under orders from Feldwey and constrained by his angel-type ultimate abilities, Dino betrays Rimuru by attempting to kidnap Ramiris.

Beretta and Apito stall him as long as they can, buying time for Zegion to fully awaken and intervene.

The awakened Zegion defeats Dino and brands a mark upon him, symbolizing that Dino is now spiritually tagged and tracked.

However, Dino manages to escape by reviving outside the labyrinth, and his betrayal is exposed to Rimuru’s side.

Over time, Dino’s view of Feldwey shifts from old comrade to dangerous fanatic.

Seeing Feldwey release the sealed being Fen and coldly plan to use Milim Nava—Veldanava’s beloved daughter and Dino’s secret responsibility—as merely a sacrifice for resurrecting Veldanava, Dino realizes Feldwey has gone past the point of no return.

This realization also forces Dino to face his own role.

He understands belatedly that his following Feldwey, even passively, has helped empower a plan that desecrates everything Veldanava cherished.

This leads Dino to regret his choices deeply.

Ultimately, using the power of Fallen King (Astaroth), he seeks to break free of Feldwey’s control and act according to his own will, especially where Milim is concerned.

Dino’s true identity is that of a seraph, one of the Primordial Seven Angels who originally served the Star King Dragon Veldanava.

He was Veldanava’s trusted sword and close aide, fighting by his side on battlefields until the world was pacified.

His prowess as a swordsman during these ancient wars is what cemented his status as the world’s greatest swordsman.

After peace was established and conflict receded from the surface, Veldanava assigned Dino to be the watcher of the surface world.

As the surface watcher, Dino took his duties seriously at first, travelling the world and observing its people.

He was present during the early days of the peaceful era Veldanava hoped to preserve.

Then tragedy struck: Veldanava and his wife Lucia died.

When Dino learned that a human nation was responsible for their deaths, his grief turned to incandescent rage.

Consumed by fury, Dino annihilated the offending country, erasing it from the world in an act of revenge.

In that moment, the heavenly ultimate skill King of the Heavens (Astarte) that Veldanava had given him warped under the weight of his wrath and sorrow, transforming into Fallen King (Lucifer) in the web version continuity.

Guy Crimson never even noticed Dino’s swift vengeance; Dino’s retribution was carried out quietly but utterly.

Even after the destruction of the murderers, Dino’s anger did not immediately subside, and he was on the verge of unleashing his wrath on the entire world.

However, he then remembered Milim Nava, the daughter left behind by Veldanava and Lucia.

He could not bring himself to destroy the world where Milim lived, and this thought finally cooled his rage.

Dino decided he would not directly interfere in Milim’s life nor formally recognize her as his lord.

Instead, he resolved to watch over her from the shadows, protecting her without her knowledge and thereby honoring Veldanava’s memory and their bond.

This silent guardianship became Dino’s new reason to live.

Even as ages passed and Dino’s attitude shifted into the lazy, drifting Demon Lord everyone sees, his loyalty to Veldanava and his concern for Milim remained unchanged deep in his heart.

In the web version, during the events involving Clayman, Dino witnesses Milim seemingly allow herself to be beaten without resisting, as part of her strategy to outplay Clayman.

Unaware of her plan and believing she is genuinely being humiliated and hurt, Dino’s anger reignites.

In that moment of protective fury, he evolves his unique skill Sloth into the ultimate King of Sloth (Belphegor).

This shows that no matter how much time passes or how lazy Dino appears, his devotion to Veldanava and his fondness for Milim never truly diminish.

Thus, behind the facade of a carefree NEET Demon Lord, Dino is a fallen seraph who carries ancient grief, lethal skill, and a quiet, unshakable loyalty to a dead master and the master’s daughter.