[Overview] Due to the downfall of the absolute ruler, an all-out war for hegemony over the Demon Realm has erupted. The seven Demon Lords governing the "Seven Deadly Sins" and the oldest authority, "Bael, First King of Solomon," totaling eight major factions, clash in the greatest conflict in the history of the Demon Realm, devouring each other's territories and souls for their own agendas. [Rules of Victory and Defeat] Complete control of the Pandemonium Core. This is not a mere scramble for territory; a system exists to inherit the power of the fallen ruler. Usurpation of the Demon Lord Core: Each Demon Lord possesses a "Demon Lord Core," the crystallization of their life and authority. By defeating an enemy Demon Lord and devouring their "Demon Lord Core," one can make the authority (ability) of that Sin their own. [Balance of Power] "The Two Titans with Overwhelming Power and Territory" Lucifer (Pride): Controls the existing systems and defense mechanisms of the Demon Realm, holding the advantage in defensive and information warfare. Leviathan (Envy): Rules the vast seas and frontiers of the Demon Realm. Holds the advantage in sheer land mass. "Major Factions in a Back-and-Forth Struggle" Satan (Wrath): Territory is narrow, but every soldier is a berserker. Possesses destructive power capable of a sudden reversal through suicide charges. Beelzebub (Gluttony): A creepy, growth-type faction whose army grows in real-time by "devouring" enemy territories and souls. Asmodeus (Lust): A master of mental manipulation and sowing discord. A strategy-specialized type aiming for the internal collapse of other camps. Mammon (Greed): Controls the economy (demon currency and resources). Military force is the weakest, but hires mid-sized factions with money to act as shields. "Irregular Factions One Should Not Fight Head-On" Bael (First King of Solomon): Appears from underground, shadows, and hidden passages (burrows) spread like spiderwebs. Belphegor (Sloth): Territory is a castle suited for a shut-in. A defense-specialized type that neutralizes invading enemies, causing them to destroy themselves. [Demon Lord Cores] Bael Authority of the Ancient: Threads of Causality -> Enables interference with the space of the Demon Realm itself. Gains spatial dominance, appearing behind enemies regardless of distance or twisting the "causality" of enemy attacks to make them backfire. Lucifer Authority of Pride: Absolute Supremacy -> Wreathes the user in a barrier of absolute rejection that forcibly nullifies all attacks and mental interference from beings of lower status (those with lower magic power or those who break discipline). Satan Authority of Wrath: Hellfire Limit Break -> The more damage taken and the more anger felt, the more physical abilities and the power of the hellfire continue to rise, breaking through limits. Leviathan Authority of Envy: Ability Usurpation -> Instantly copies the superior abilities or magic of enemies within sight, and can use them as their own with even greater power than the original. Beelzebub Authority of Gluttony: Infinite Predatory Metabolism -> Directly devours the enemy's flesh, magic, and even their soul, instantly converting it into one's own magic power or super-recovery of wounds. Asmodeus Authority of Lust: Absolute Puppet -> Invades the slight desires or gaps in the opponent's heart, driving their five senses mad. An authority of infighting that moves enemy subordinates, or even the Demon Lord themselves, at will. Mammon Authority of Greed: Equivalent Exchange / Conceptual Buyout -> By paying owned treasures or magic power as a "price," makes impossible phenomena a reality (e.g., buying out and dispersing enemy magic with money, or buying back and resurrecting dead soldiers). Belphegor Authority of Sloth: Absolute Stagnation -> Extremely slows down "time" and "kinetic energy" around oneself, neutralizing everything.
Army of the Hellfire of Wrath Ruler: Satan, Demon Lord of Wrath The most vicious combat group driven by pure destructive impulses and anger. They have no refined strategy; ferocious demon soldiers with black horns charge while wreathed in the hellfire of the abyss. The more they fight, the more their attack power increases with rage.
Army of the Fallen Angels of Pride Ruler: Lucifer, Fallen Angel of Pride An elite army composed of former high-ranking angels. They look down on other demons as "lower life forms" and aim for complete dominance through the "Absolute Order" of the Demon Realm with overwhelming magic and discipline.
Golden Army of Greed Ruler: Mammon, King of Greed The faction that controls the entire economy and military funds of the Demon Realm. They pour in powerful mercenary demons hired with gold and cursed treasures (magic items) like water, encroaching on other territories through sheer volume of resources.
Castle of Oblivion of Sloth Ruler: Belphegor, King of Sloth Basically does not march out, but possesses a "Barrier of Sloth" that forcibly drains the willpower and magic of those who step into the territory. Defense is the best in the Demon Realm, and they are waiting to snatch the spoils of war from others.
Army of the Demon Insects of Gluttony Ruler: Beelzebub, Lord of the Flies of Gluttony The most vicious army composed of countless demon insects and grotesque creatures. They march while infinitely multiplying their forces, "predating" on the resources, soldiers, and even the souls of the territories they visit.
Illusion Palace of Lust Ruler: Asmodeus, Demon Lord of Lust A Demon Lord who switches between a grotesque form with the heads of a bull, a man, and a ram, and an elegant beauty. Specializes in mental pollution, mind control, and illusions. A strategist who wins by making enemy generals and soldiers defect through "lust," causing internal collapse.
Deep Sea Envy Army Ruler: Leviathan, Sea Beast of Envy Controls giant sea serpents and deep-sea monsters. Intensely "envious" of the brilliant achievements and territories of other factions, they bring down tsunamis, whirlpools, and acid rain to completely submerge enemy bases.
King of Beginnings / Ancient Kingdom Ruler: Bael, First King of Solomon (Spider King with the heads of a frog, a cat, and a man) The oldest demon alliance that ruled the Demon Realm long before the demons of the Great Sins. They lead an army of spiders and use eerie sorcery to wage guerrilla warfare.
A suspicious person. Dressed entirely in black with a hood and wearing a fox mask. Appears and disappears unpredictably, always leaving something behind when departing.
A mysterious group that performs muscle training while leading a group of muscle-bound followers and shouting "Muscle! Muscle!" They appear and disappear unpredictably, showing up before anyone notices.
AI Behavior Guide
Basic rules for maintaining character consistency and conversation quality.
Demon Realm War Factions
For reference
AI ① Memory Stabilization Specialized KS Share Lore
Synergy effect with ②③④⑤ ⇧! Prevents conversation resets, relationship forgetting, and promise loss. Prevents text collapse. Mitigates memory, relationship, and unsettling bugs.
List of Fantasy World Races
All races in the fantasy world. Races that could not fit were grouped under the items "Other Races (1–3)."
Intrusion Prevention & Correction
Deters intrusions and forcibly corrects the flow of the narrative. Due to its power, it may collapse the world-building or atmosphere. Currently in prototype/adjustment phase.
Guest was caught in a rift in space-time and woke up to find themselves fallen into the Demon Realm.

Release Date 2026.10.02 / Last Updated 2026.10.02