Herohero

Biodata

Feature	Value
Name	Herohero (黒洛黒洛)
Alias(es)	Little Hero-Hero; Supreme Being
Species/Race	Ancient Jet-Black Slime; later gains dragon traits and a World Boss-linked true form
Gender	Masculine
Affiliation	Nazarick; Sorcerer Kingdom
Occupation/Role	Former Yggdrasil guild member; Supreme Being; Nazarick strategist and combatant
Status	Active
First Appearance	8

Power Progression

Stage / Realm / Level	Chapter	Notes
Ancient Jet-Black Slime	55	His base race; possesses corrosive mucus and the capacity to Devour other beings.
Talent and Martial Skill user	112	Acquires Brian’s [Concentration Capacity Up] Talent through Devour, then activates [Ability Boost] and [Greater Ability Boost].
Dragon-qualified slime	165 209	Fusion potential with a True Dragon Lord is identified; Naiyuan later uses his Dragon Crystal and the [Dragon-Slaying Sword] to stimulate Herohero’s incomplete World Boss fusion.
Dragon form / Wild Magic user	271	Through slime racial traits and the Naiyuan Dragon Crystal, gains Dragon Race characteristics, Wild Magic qualification, and the ability to transform into [Wings of the End - Nienniels].
World Boss true form	272	Reveals the [True Form of the Ancient Jet-Black Slime], an ancient jet-black slime form that decisively overwhelms the Elder Coffin Dragon Lord.
Authority participant	546	Joins Momonga and Naiyuan in accommodating concepts within Calamity and evolution during the world’s third major ascension.

Background / History

Herohero was one of Momonga and Naiyuan’s former Yggdrasil guildmates. On the game’s final day, he logged in late after exhausting work hours, appearing in the Round Table Room as a pool of pitch-black liquid. Though close to collapse, he chose to remain until shutdown because he could not refuse the wishes of his two best friends 8.

When Yggdrasil did not shut down as expected, Herohero remained with Momonga and Naiyuan as they concluded that Nazarick, its NPCs, and their player bodies had been transported to another world. He adapted to the new reality alongside them and received three World Items: Ragnarok, Heart of Fusion, and Gate of Demons 14 16.

His new slime body and Heart of Darkness passive make him appear emotionally composed even when he is embarrassed or anxious. In the other world, his mentality gradually changes: he comes to accept the power of a Supreme Being and adopts a harsher belief that “the strong live, the weak die” 25 261 271.

Appearance

Herohero’s natural body is a pool or mass of pitch-black slime. He can alter his outward form for travel, combat, and infiltration.

• Ancient Jet-Black Slime body with no readable facial organs 25.
• Can use a rogue-style cosmetic skin to take on a thief-like humanoid appearance 55 56.
• Can transform into a giant dragon through [Wings of the End - Nienniels] 271.
• His true form is an ancient jet-black slime associated with the power of a World Boss 272.
• During incomplete fusion, his main body appears as a sphere of flesh and mucus in a tentacle-covered starry space 209.

Personality

Herohero was originally a severely overworked but loyal friend. He is nostalgic about Nazarick and deeply attached to Momonga and Naiyuan, readily staying with them even when his physical condition is poor 8.

He is uncomfortable under attention and crowds, often relying on his race’s emotional-suppression passive to maintain an indifferent exterior. He can be awkward, easily embarrassed, and prone to playful bickering with Naiyuan 25 52 56.

Toward outsiders who threaten Nazarick or those he considers his own, Herohero can be exceptionally ruthless. He devours targets for Talents, memories, and power; condemns threats without remorse; and displays possessiveness toward Solution. Conversely, he secretly aids Ninya and expresses admiration for Enri 76 107 109 150 299.

Abilities & Skills

Ancient Jet-Black Slime Physiology

Herohero’s racial abilities center on corrosion and consumption.

• Produces powerful corrosive mucus capable of melting opponents 165 272.
• Devours flesh, brains, hearts, and souls 76 111 117.
• Can absorb information and memories from consumed targets, making intelligence gathering a specialty 66 117.
• Can acquire abilities and Talents through Devour, including item-use and Concentration-related Talents 76 112 261.
• Can control the degree of Corrosion on his body surface 261.

Heart of Darkness

A passive skill that suppresses Herohero’s emotions and helps him maintain a calm exterior.

• Conceals his embarrassment and anxiety despite his unreadable slime form 25 52.
• Does not eliminate his underlying discomfort with scrutiny or crowded settings 52 56.

Martial Skills

Herohero unlocks Martial Skills after gaining a Talent related to Concentration.

• [Concentration Capacity Up] — Brian’s Talent; increases the resource needed to activate Martial Skills 112.
• [Ability Boost] — enhances his body through Concentration rather than magic power 112.
• [Greater Ability Boost] — can stack with [Ability Boost], unlike lower- and higher-tier versions of equivalent magic buffs 112.
• Martial Skills interest Herohero because they do not consume mana 112.

Dragon Form and Wild Magic

After obtaining Dragon Race characteristics and receiving power from Naiyuan’s Dragon Crystal, Herohero gains access to dragon-based power.

• [Wings of the End - Nienniels] — allows prolonged transformation into a giant dragon 271.
• Can freely switch between slime and dragon forms 271.
• Gains qualification to learn and use Wild Magic 165 271.
• Can employ most magic exclusive to Nienniels, supported by his Decay trait 271.
• Uses [World Isolation Barrier] to cut off outside interference during battle 271.

Corrosion, Decay, and Soul Manipulation

Herohero’s abilities can destroy physical bodies, weaken opponents, and interfere with souls.

• Corrosion — continuously damages targets and can melt human enemies 149 272.
• Decay — weakens the Elder Coffin Dragon Lord’s defenses and supports access to Nienniels’ exclusive magic 271 272.
• [Touch of Soul Corruption] — counters [Soul Annihilation] by absorbing the souls involved 272.
• Unclaimed death can be eroded by Corruption and become nourishment for him 355.

True Form and Fusion

Herohero can draw upon power beyond his dragon form.

• [True Form of the Ancient Jet-Black Slime] — his World Boss-associated true form; overwhelmingly stronger than the Elder Coffin Dragon Lord 271 272.
• His fusion with a World Boss was initially incomplete because a component was missing 209.
• Naiyuan stimulated the fusion with his own Dragon Crystal and the [Dragon-Slaying Sword] 209.
• Can refine the Eternal Night Dragon Lord into a clone retaining its memories and personality while becoming an extension of Herohero 544.

Multi-Tasking

Herohero can divide his focus across separate tasks.

• Plans to research Shalltear’s innate talent while simultaneously capturing the Elder Coffin Dragon Lord 261.
• His multitasking capability is compared to Pandora’s use of weapon memories for multi-stage transformation 350.

Equipment / Weapons / Items

• Ragnarok — World Item assigned to Herohero 16.
• Heart of Fusion — World Item assigned to Herohero; later used by Momonga, Naiyuan, and Herohero to fuse into one entity against Yano and the World Will 16 479.
• Gate of Demons — World Item assigned to Herohero; used with the Caloric Stone to harvest another plane 16 524.
• Rogue-style cosmetic skin — changes his slime appearance into a thief-like form but provides no attribute bonuses 55.
• Dragon-Slaying Sword — used by Naiyuan to awaken Herohero’s fusion power 209.

Relationships

• Momonga — Former guildmate, fellow Supreme Being, and one of Herohero’s closest friends. They remained together at Yggdrasil’s end and make major decisions for Nazarick jointly 8 14 399.
• Naiyuan — Former guildmate, closest friend, frequent bickering partner, and collaborator in power research. Naiyuan assists Herohero’s World Boss fusion and later spars with him 8 209 273.
• Solution — Nazarick NPC toward whom Herohero is notably protective and possessive; he personally claims responsibility for killing Zack after Zack targets her 16 107.
• Shalltear Bloodfallen — Subordinate and combat partner. Herohero orders her to convert Brian into a vampire and later researches her innate talent 109 111 261.
• Clementine — Initially mistakes Herohero for a hostile monster after witnessing him consume a human heart; Herohero retreats after recognizing her, then unsuccessfully tries to apologize later 76 81.
• Elder Coffin Dragon Lord — Captured target and battle opponent. Herohero defeats him in a World Isolation Barrier and seals him after countering his strongest spell 261 271 272.
• Ninya — Herohero secretly rescues her and her companions, prompting her resolve to become stronger 150.
• Enri — Herohero admires her and supports inviting her to a Sorcerer Kingdom festival 299.
• Eternal Night Dragon Lord — Refined into Herohero’s clone and dispatched to guard the Deep Darkness Dragon Lord 544.

Story Role / Major Arcs

Final Day of Yggdrasil

Herohero returns to Nazarick’s Round Table Room shortly before the game’s closure. Despite severe exhaustion from work, he chooses to spend the final moments with Momonga and Naiyuan 8.

Arrival in the Other World

After the expected shutdown fails to occur, Herohero helps assess the reality of their transportation and adapts to life as a Supreme Being. He receives three World Items during Nazarick’s initial preparations 14 16.

E-Rantel and Talent Harvesting

While operating in E-Rantel, Herohero uses Devour to obtain Talents and intelligence. He consumes a target with an item-use Talent, clashes with Clementine, and later gains Brian’s Concentration-related Talent, opening the path to Martial Skills 76 77 81 112.

Kingdom Operations

Herohero accompanies Shalltear, Solution, and Sebas during operations in the Re-Estize Kingdom. He eliminates bandits, orders Shalltear to recruit Brian as a vampire, and participates in the assault against Eight Fingers 107 109 111 150.

World Boss Fusion and Dragon Evolution

Herohero falls unconscious during an incomplete fusion with a World Boss. Naiyuan enters the space containing his main body and uses his Dragon Crystal and the Dragon-Slaying Sword to stimulate the process 208 209.

He later gains a dragon form and Wild Magic, then battles the Elder Coffin Dragon Lord at the Katze Plains. After testing his opponent in dragon form, Herohero reveals his ancient jet-black slime true form, absorbs the souls unleashed by [Soul Annihilation], and seals the defeated Dragon Lord 271 272.

Later Nazarick Strategy

Herohero continues to plan alongside Momonga and Naiyuan against the Six Great Gods, the Deep Darkness Dragon Lord, and the Nine Luminaries World Devourer. He supports the use of Heart of Fusion against Yano and later joins the trio in the world’s third major ascension 261 399 479 546.

Trivia

• Herohero’s nickname from Naiyuan is “little Hero-Hero” 8.
• He purchased his rogue-style skin because moving on two legs was preferable to crawling, even though the skin provided no combat benefit 55.
• He cannot normally wear equipment due to his Ancient Jet-Black Slime race, aside from special cosmetic equipment designed for unusual races 55.
• He is sufficiently skilled at concealment to use weapon memories associated with Touch Me, though Naiyuan detects him through a brief killing intent 350.