Secret Project Achemedia Final Duel
Duel is a mysterious demon. Though he initially went berserk in the past, he later seemingly became devoted to protecting Mari, but his true motives in the present remain vastly unknown.


Sometime before the founding of Kounat, the League of Demons initiated a surprise attack on the ancient demons, leading to the Ancient War where the ancient demon's hero, Duel went berserk upon the death of his lover, Edna. He annihilated everyone in disregard of whether they were allies or enemies, and because of that the war was practically terminated.

Duel also saved Mari from the explosion that annihilated Kounat for his own purposes, which are still unknown.


Zero's story description states that Duel created one of the three legendary demon weapons, Eclipse, and used it in the Demon Wars. However, for some reason, the lust of destruction grew within, killings the demons that stand in his path. A wizard, Oz, created Grandark to counter Eclipse.

In Thunder Hammer, he makes his appearance to steal the Chase's Deity Orbs. Zero then appears and attempts to attack Duel, who recognizes him as "one of them" and leaves. Grandark stops his master, warning him that Duel has become too powerful to defeat thanks to his Transcendence and the new demonic tribe he had allied with.

Duel appears in Kounat's Collapse after Ashtaroth's defeat and prevents Ashtaroth from taking control of Mari, who had been teleported there by the Aernas Hammer. He then takes custody of the Klara Libri, and removes Mari's memory of her past before leaving.


Duel attacks by firing piercing blue orbs and a homing black orb. Note that the homing orb cannot be destroyed by simply hitting it, and must be outrunned.

He is capable of teleportation, yet he must open a black hole to do so.

It should be noted that Duel cannot be defeated (all damage does 1 on him), and will only leave once players have hit him enough.



Eclipse Transcendence

A player wielding Duel's swords

  • Duel is also known as Duel Pone Zec Avenger.
    • Despite being a foreign server term, Zero's North American description oddly names him this. This occurs again in Kounat's Collapse.
  • Despite the fact that Duel cannot be defeated, he drops items and even a card, oddly a trait not shared by Ashtaroth.
  • On Duel's back are large swords and what appears to be a pike. They are called Eclipse and Transcendence.
    • In Thunder Hammer Champion Mode, there is a chance that Duel will drop the swords, which are treated as accessories. Also, the Eclipse and Transcendence can be made out of both swords, 11796 Gems, and 750,000 GP with a level 75 character. Note that the crafted material is only limited to the selected character.
  • In Thunder Hammer, Duel appears to be holding back, as his only intentions are to steal the Deity Orbs from the Grand Chase rather than killing them. This is also supported on how he is a demon like Dio (usually possessing unimaginable strength) and he does not use his swords on his back.
  • Strangely, despite the fact that Duel has been shown to be antagonist (by aiding Ashtaroth and according to Zero's description), the demon suddenly assists the Grand Chase upon his arrival in Kounat's Collapse by denying Ashtaroth the Aernas Hammer and then proceeds to ease Mari's suffering of the Klara Libri by erasing her memories of it.
  • Strangely, despite supposedly being devoted to protecting Mari, he attacks her and her comrades in Thunder Hammer.
  • According to the Naver Blog, Duel and Dio are antagonistic towards each other for reasons yet to be revealed. In Grand Chase Dimensional Chaser, it is revealed that Duel killed Dio's father.
  • According to the Naver Blog, Duel is an "other" member of the Twelve Disciples whose duty as the Gate Keeper is to protect the Key Master, Mari.
  • According to a Brazilian article, Duel tried to activate a time machine in hopes to prevent Edna from dying and needed something from Mari to do so.
  • There is a chibi variant Pet of Duel. This Pet, known as Duelly, attacks by transforming into his original size and using a black orb similar to Thanny Boy's Shadow Explosion.
Bermesiah Monsters
Monsters MushmonSlimeGoblinStone GoblinOrcBlue SlimeCrooked CrabHarpyOrc WarriorStone OrcGonGorgonRed SlimeDrillmonGreen SlimeToxic ToadPoisonous MushroomTrollSkeletonPumpkin HeadZombie Orc WarriorZombie Stone OrcParaminimyMini Stone GolemStone TrollGhost BladerGhost ShooterGhost PriestGhost Samurai
Bosses TreantWendyOrc WarriorHarpy QueenOrc LordGorgosTrollGiant DrillmonElizabethLichParadomGaikoz
Silver Land Monsters
Monsters Tree CrawlerBlood LocustDessicated EntMonstrous EntFire CrawlerUndead FighterShadow EmissaryClaw ShrimpEmerald Claw ShrimpCoral FiendShock RevenantSwamp SpiritSwamp GoblinViolet FairyViolet PixieMystic GolemVenomous GnatAudrey SeedlingTiny CreeperQueen CreeperOnyx WendyBloodwind OrcBloodwind Orc WarriorMagma ParadomTartarusBlack Knight Shield BearerBlack Knight SpearmanDark AcolyteBlack Tempest
Bosses Guardian EntBlack Fairy QueenKrakosKing GuangAudreyKing FangVictor
Ellia Monsters
Monsters Armored LobsterHungry GhostMini Ice GolemDark Anmon ScoutDark Anmon GuardDark MageDark MongbanMongban LeaderElite Anmon ScoutMini Fire GolemLichDark GorgosDark TrollSkeleton KnightSkeleton ArcherFire GolemSkeleton Knight BossSkeleton Archer BossParadomMini Stone GolemViolent GorgonViolent GonViolent HarpyViolent DrillmonViolent GoblinViolent Stone GoblinViolent OrcViolent Orc WarriorArmored CatBlack Fairy QueenOrc Lord
Bosses PartusayElenaKamikiBasiliskGardosenKaze'aze LassKaze'azeCyclopsGiant Stone GolemDark Anmon
Xenia Monsters
Monsters Native SpearmanNative LeaderCarnivorous Plant Jr.BeholderMutated SkeletonMoss MonsterFanatic Shield SoldierFanatic Bomb SoldierGashimonFanatic MonkVanessaFoul SwordsmanCorrupt RangerCursed Cairn StoneVile NagaAshtarothFytrosWyrm SpawnIron GuardMagmokIce Wyrm SpawnIce FangEndarionAronDK Mark-IMistonHideous BorerAncient GiantDecoyDK Mark-IIPoisonous Thorn NunklemonWoodenDark StormFurious StormSataniel's WarriorGargoyleDark HierophantHeraIblis
Bosses OctusLenasianSamsaraMynosStarkilnYaminiPerseoRukkhaThanatos
Alcubra Monsters
Monsters Stone Clan GoblinStone Clan WorkerStone Clan FighterGrim PriorBrutusUnderpass LarvaUnderpass ErgateUnderpass DinergateUnderpass HugateScorpisAranya's EggKungjiMagic KungjiBig KungjiGuardian KungjiSand ErgateSand DinergateScorpingSand YounglingFrillzardGiant FrillzardMine BanditSword BanditAxe BanditCrossbow BanditHooded JackalHooded HoundHooded CrowHooded ScorpionSeth's AmazoneSeth's MummySeth's Demonic MageAnubis
Bosses SethekAranyaElder KungjiSand RulerKhufuCarteImmortal Barakhufu
Archimedia Monsters
Monsters Black Wood ScoutBlack Wood AssassinFire Hammer SmithFire Hammer TorcherFire Hammer BerserkerSpiderbot GuardIron Dwarf OverseerIron Dwarf EngineerFire Hammer DrillerPower ShovelThunder Hammer DefenderTech GuardMecha TaurusVoidThunder Hammer RiflemanThunder Hammer GuardBroken Kounat CubeDioDimensional PortalGarouGarou MageGarou BerserkerPower LeaderAssassin ChampionDark Elven ScoutDark Elven AssassinDark Elven ArcherGuard TowerDark Elven RiderRoyal Elven GuardElite Elven MageGuardian SpiritGolemDrawlVeronDahliaHighlander's RelicsGraham's Relics
Bosses Talin ElfbaneSentry Keeper No. 1Sentry Keeper No. 2ArawnVeronDrawlDahliaQuoronnosAshtaroth
Île de Frost Monsters
Monsters ServantCorporal FencerCorporal LancerMutated RatPrisonerBlood ArachniaEscaped PrisonerPoisonous ArachniaGiant Poisonous ArachniaCorporal FencerSergeant FencerSorcererSergeant MusketeerColonel MusketeerCleaner MaidArch SorcererHead Cleaner MaidColonel LancerKitchen MaidHead Kitchen MaidSergeant SniperButlerManagerGiant ArachniaGiant Blood ArachniaHead ManagerGigantic Blood ArachniaGigantic Poisonous ArachniaColonel Sniper
Bosses Gatekeeper Vasker Bill] • Death Row TarikGuard Captain SchumacherDreyfus de VillepinCount Von BacchantesCountess Arachne
Trivia Monsters
Monsters Stone-Fist GoliathBolder-Fist GoliathStone Elemental GoliathEarth Elemental GoliathVoid ScoutLacerta PathfinderLacerta FighterLacerta WarriorLacerta BerserkerLacerta ShamanLacerta SorcererLacerta ServantVoid PatrolVoid PathfinderVoid ObserverVoid WarriorVoid ShamanVoid Sorcerer
Bosses Mountain Giant TrokaSkyler, the Skeletal WingWar Chief RakLakArch-Mage RokLokMorid, the DespairGarud, the Hatred
Hero Dungeon Monsters
Monsters Destructive Ice GolemDestructive Stone GolemDestructive Fire GolemVengeful GaikozWicked KamikiHellish GardosenFire BasiliskIce BasiliskFeeble GauntNaamah's SoulInfernal SpearmanInfernal AcolyteInfernal MagmokInfernal GuardInfernal Death WormInfernal Cursed Guard
Bosses NaamahHellstromGrandiel
Event Dungeon Monsters
Monsters Gold SlimeJugglerHammer ManLionessOretinaMournful PassengerMonster Train AttendantMonster Train Security PersonnelEscaped PrisonerHungry ThommoHungry SarimanokHungry HananaHungry MonkeybeardHungry DuellyOne-Eyed GoblinBedeviled BoxTiger TraderManiacal MerchantHaetaeJeremiahFlying SaucerMini-CopterGoblin FlightGoblin Rocket BoosterGoblin RocketeerFlying Guard MachineAero Sentry Keeper MK-1Aero Sentry Keeper MK-2 • Giant Battleship
Bosses RingmasterDeranged RingmasterCasey BonesDeath Furnace 301LotusGumiho • Talinroid • Harkion
Raid Dungeon Monsters
Monsters HatchlingLizardmanDragoon
Bosses Berkas