Koku

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Game Strategy Lore Voice
[Distorted Beast of Annihilation]This title is an unofficial, amateur translation.
Koku
MAX HP 12544★: 1254
MAX ATK 89304★: 8930
BASE DA/TAThis character's base double attack rate and triple attack rate.Characters with support skills that grant guaranteed multiattacks may have very high values. 7% DA / 3% TA
Element
RaceOfficially called "Type" in-game.
Style
SpecialtyThis character gains 20% more ATK from weapons of this type in your grid.
Exp. BonusExpedition Bonus Type in Auto-Expeditions None
GenderGender is a character attribute used for game mechanics. A character's lore, appearance, and other factors do not affect this attribute. Other
Voice Actor Makoto Koichi
How to Recruit
Rise of the Beasts
ID 3040571000
Char ID 3264
Uncap Limit
NameJP コク
TitleJP 死滅の歪獣
Voice ActorJP 小市眞琴
Release Date 2025-01-07
Other Sites GameWithKamigameHuiji Wiki
(Chinese wiki)GBF Asset LookupGBF Animation Player
Cloaked in an ominous shroud of darkness, this being desires to bring destruction to the vast skies and all that is within. Powerless and unwanted, the distorted vessel patiently awaits the day to enact revenge.

Charge Attack
Icon Name Effect
Last Rites: Huolin 450%Massive Dark damage to a foe.
All Dark allies gain 50% Skill DMG UpSkill DMG is boosted
Strength: 50%Duration: 3.5 turnsApplied during the attack phase.
On the next turn, it'll have 3 turns remaining. and 25% Skill DMG Cap UpMaximum amount of skill DMG that can be dealt per hit is boosted
Strength: 25%Duration: 3.5 turnsApplied during the attack phase.
On the next turn, it'll have 3 turns remaining..[1]
End cooldown for Koku's skills.

Skills
Icon Name Cooldown Duration Obtained Effect
Blessings of Fortune 9 turns
Longxin Lvl 3:
8 turns 		- Lvl 1
 400% Dark damage to all foes (Damage cap: ~635,000).
All Dark allies gain 10% ATK Up (Stackable / Max: 40%)ATK is boosted while active (Stackable)
Strength: 10% (Max: 40%)Multiplier: Unique StackableDuration: Indefinite and 10% DEF Up (Stackable / Max: 40%)DEF is boosted while active (Stackable)
Strength: 10% (Max: 40%)Duration: Indefinite.[1]
After clearing 4th Fate Episode at Obsidian Longxin level 7:
All Dark allies also gain Dispel Cancel (1 time)Buffs can't be removed or shortened (1 time)
Duration: Indefinite.
Curse of Omens 9 turns
Longxin Lvl 5:
8 turns 		180 sec Lvl 1
 4-hit, 150% Dark damage to a foe (Damage cap: ~148,000 per hit).
Inflict 10% ATK Down (Stackable / Max: 40%)ATK is lowered (Stackable)
Strength: 10% (Max: 40%)Base Accuracy: 100%Duration: 180 seconds and 10% DEF Down (Stackable / Max: 40%)DEF is lowered (Stackable)
Strength: 10% (Max: 40%)Base Accuracy: 100%Duration: 180 seconds.
After clearing 5th Fate Episode at Obsidian Longxin level 9:
Also inflict 10% Debuff Res. Down (Stackable / Max: 30%)Debuff resistance is lowered (Stackable)
Strength: 10% (Max: 30%)Base Accuracy: 100%Duration: 180 seconds.[1]
Violet Annihilation 8 turns - Lvl 1
 Plain damage to a foe based on 10% of its current HP (Damage cap: 444,444).[1]
Remove 1 buff.
(When a foe has 5 or more buffs at end of turn: End cooldown.)
After clearing 6th Fate Episode at Obsidian Longxin level 10:
(Number of activations increases upon each cast [Max: 3 times].)

Support SkillsDoes not work from the backline unless explicitly stated.
Icon Name Obtained Effect
For Whom Obsidian Gleams Lvl 1
 50% hit to charge bar gain, 30% hit to C.A. damage, and amplify skill damage by 30%.[1]
Upon being targeted by a Dark ally's buff or healing skill: Gain Charge Bar +50%Instantly boosts Charge Bar by 50%
Strength: 50%.
Emissary of Annihilation Lvl 1
 10% boost to Mistfall's weapon skills.
(Takes effect even when Koku is a sub ally.)

Extended Mastery Perks
Style
  • ATK
    ★☆☆★★☆★★★
    +500+800+1000
  • DEF
    ★☆☆★★☆★★★
    5%8%10%
  • Debuff Resistance
    ★☆☆★★☆★★★
    5%8%10%
  • Overdrive Attack
    ★☆☆★★☆★★★
    5%8%10%
  • Overdrive Curbed
    ★☆☆★★☆★★★
    5%8%10%
RaceCalled "Type" in-game.
  • ATK
    ★☆☆★★☆★★★
    +500+800+1000
  • DEF
    ★☆☆★★☆★★★
    5%8%10%
  • HP
    ★☆☆★★☆★★★
    250500750
  • Dark ATK Up
    ★☆☆★★☆★★★
    5%8%10%
  • Charge Attack Damage
    ★☆☆★★☆★★★
    10%15%20%
Individual
  • Skill Damage
    ★☆☆★★☆★★★
    10%15%20%
  • Skill Damage Cap
    ★☆☆★★☆★★★
    5%8%10%
  • Skill Damage Cap
    ★☆☆★★☆★★★
    5%8%10%
  • Debuff Success Rate Up
    ★☆☆★★☆★★★
    5%8%10%
  • Perk unknown, please help fill it out

Grid Suggestions

Load grids using Koku

Gameplay Notes

For Whom Obsidian Gleams

  • The charge boost only triggers when other Dark allies use skills with a yellow or green border which target Koku or all allies.
    • The skill does not have to actually heal or grant a buff.
    • Skills with other border colors do not trigger the effect, even if they provide a buff or a heal.
    • Auto-activated skills do not trigger this support skill.

Emissary of Annihilation

  • Weapon skill boosts from this support skill are included when viewing the Estimated Damage window in the Party screen.
  • In effect even when Koku is knocked out.

Uncap Materials

Uncap 1★
Uncap 2★
Uncap 3★
Uncap 4★

Awakening Materials

Lvl 2
Lvl 8

Facsimile Compatibility

Icon Skill Copyable?
Blessings of Fortune Yes
Curse of Omens Yes
Violet Annihilation No

Longxin's Resonance

  • Unlike normal characters, Koku's skills are enhanced by clearing their Fate Episodes, which are unlocked by upgrading Obsidian Longxin to certain levels.
  • Longxin's Resonance enhancements can be viewed in Koku's Extended Mastery bonuses screen.
Lvl Fate Unlocked Skill Enhanced
3 Impossibly Delicious Blessings of Fortune400% Dark damage to all foes (Damage cap: ~635,000).
All Dark allies gain 10% ATK Up (Stackable / Max: 40%)ATK is boosted while active (Stackable)
Strength: 10% (Max: 40%)Multiplier: Unique StackableDuration: Indefinite and 10% DEF Up (Stackable / Max: 40%)DEF is boosted while active (Stackable)
Strength: 10% (Max: 40%)Duration: Indefinite.
After clearing 4th Fate Episode at Obsidian Longxin level 7:
All Dark allies also gain Dispel Cancel (1 time)Buffs can't be removed or shortened (1 time)
Duration: Indefinite. Cooldown Reduced
5 Blood-Boiling Happenings Curse of Omens4-hit, 150% Dark damage to a foe (Damage cap: ~148,000 per hit).
Inflict 10% ATK Down (Stackable / Max: 40%)ATK is lowered (Stackable)
Strength: 10% (Max: 40%)Base Accuracy: 100%Duration: 180 seconds and 10% DEF Down (Stackable / Max: 40%)DEF is lowered (Stackable)
Strength: 10% (Max: 40%)Base Accuracy: 100%Duration: 180 seconds.
After clearing 5th Fate Episode at Obsidian Longxin level 9:
Also inflict 10% Debuff Res. Down (Stackable / Max: 30%)Debuff resistance is lowered (Stackable)
Strength: 10% (Max: 30%)Base Accuracy: 100%Duration: 180 seconds. Cooldown Reduced
7 Qilin, Instrument of War Blessings of Fortune400% Dark damage to all foes (Damage cap: ~635,000).
All Dark allies gain 10% ATK Up (Stackable / Max: 40%)ATK is boosted while active (Stackable)
Strength: 10% (Max: 40%)Multiplier: Unique StackableDuration: Indefinite and 10% DEF Up (Stackable / Max: 40%)DEF is boosted while active (Stackable)
Strength: 10% (Max: 40%)Duration: Indefinite.
After clearing 4th Fate Episode at Obsidian Longxin level 7:
All Dark allies also gain Dispel Cancel (1 time)Buffs can't be removed or shortened (1 time)
Duration: Indefinite. Enhanced
9 The Might of Koku Curse of Omens4-hit, 150% Dark damage to a foe (Damage cap: ~148,000 per hit).
Inflict 10% ATK Down (Stackable / Max: 40%)ATK is lowered (Stackable)
Strength: 10% (Max: 40%)Base Accuracy: 100%Duration: 180 seconds and 10% DEF Down (Stackable / Max: 40%)DEF is lowered (Stackable)
Strength: 10% (Max: 40%)Base Accuracy: 100%Duration: 180 seconds.
After clearing 5th Fate Episode at Obsidian Longxin level 9:
Also inflict 10% Debuff Res. Down (Stackable / Max: 30%)Debuff resistance is lowered (Stackable)
Strength: 10% (Max: 30%)Base Accuracy: 100%Duration: 180 seconds. Enhanced
10 Unacceptable Benediction Violet AnnihilationPlain damage to a foe based on 10% of its current HP (Damage cap: 444,444).
Remove 1 buff.
(When a foe has 5 or more buffs at end of turn: End cooldown.)
After clearing 6th Fate Episode at Obsidian Longxin level 10:
(Number of activations increases upon each cast [Max: 3 times].) Enhanced

For information on how to obtain and upgrade Obsidian Longxin, see Rise of the Beasts.

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 GameWith, Koku. https://グランブルーファンタジー.gamewith.jp/article/show/479753
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