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Medium portrait kostas fe16.png
Kostas' portrait from Three Houses.





Starting class


Voiced by


What is this nonsense?! All I was told was to kill as many noble pipsqueaks as possible! No one said anything about the Knights of damned Seiros being on our trail!
— Kostas, to the Flame Emperor.

Kostas (Japanese: コスタス Kostas) is a character appearing in Fire Emblem: Three Houses. He is the leader of a pack of bandits, hired by the Flame Emperor.

Fire Emblem: Three Houses


At the beginning of Three Houses, Kostas ambushes Edelgard, Dimitri, and Claude at dawn, intent on killing them. Jeralt and his child Byleth arrive just in time to aid them in defeating Kostas and his band of thieves. After the battle, Kostas attempts to kill Edelgard, but Byleth protects her from the attack, putting them on the verge of death. Just before the attack can connect, a mysterious power allows Byleth to rewind time to the moment before the attack, allowing Byleth to counter Kostas' blow and save Edelgard. Kostas and his remaining henchmen retreat when the Knights of Seiros arrive to apprehend them.

Later at the Red Canyon ruins, Kostas objects to the deal being given to him by his employer, the Flame Emperor, since having to battle the Knights of Seros was not part of it. The Emperor calls Kostas worthless for worrying about the Knights of Seiros and chides him for underestimating them and departs to find Kostas' replacements before he can argue further.

Kostas battles Byleth and their class when they reach the canyon under Rhea's orders and is slain.



Normal Hard Maddening

Level 3
Movement 5
Crest --
Max HP 28 Luck 5
Strength 10 Defense 6
Magic 5 Resistance 1
Dexterity 7 Charm 6
Speed 7
Inventory Abilities
  Iron Axe  --
Combat arts Spells Battalion
-- -- --
Skill Levels
E E E E E E E E E E E  

Chapter 2

Normal Hard Maddening

Level 4
Movement -
Crest --
Max HP 30 Luck 8
Strength 11 Defense 7
Magic 6 Resistance 2
Dexterity 13 Charm 7+1
Speed 13
Inventory Abilities
  Iron Axe   Steal
  Axe Prowess Lv 3
Combat arts Spells Battalion
-- --   Iron King's Thieves Lv 3
Skill Levels
C E E E E E E E E E E  

Personality and character

While Kostas has little screentime to develop his personality, he consistently acts in a violent manner with a notable disregard for the nobility. He is easily flustered when the situation turns against him, but is also defiant enough to go down swinging when confronted by the Knights of Seiros.


Battle quotes

I'm gonna kill you where you stand...
— Kostas in the Prologue
Kostas: What the?! Aren't you Jeralt the Blade Breaker? What's a renowned mercenary like you doing here?
Jeralt: I'm the one who should be complaining. I'm caught up in the mess you started!

— Kostas in the Prologue against Jeralt
Hey, you with the blank stare! Outta my way!
— Kostas in the Prologue against Byleth
Sending these brats instead of the knights means they've underestimated me! Big mistake!
— Kostas in Chapter 2
Y-you're... It can't be! The mercenary from before? So what, now you're pals with the knights? I'll kill you and your pesky brats!
— Kostas in Chapter 2 against Byleth
Kostas: Spoiled little noble! Just die like a good little rich kid!
Edelgard: Do you really think being born a commoner gives you the right to kill? Despicable.

— Kostas in Chapter 2 against Edelgard.
Kostas: Spoiled little noble! Just die like a good little rich kid!
Dimitri: Unfortunately for you, I will not oblige. You will regret all that you have done.

— Kostas in Chapter 2 against Dimitri.
Kostas: Spoiled little noble! Just die like a good little rich kid!
Claude: Being noble has nothing to do with who you are as a person or how hard your life is. Your logic is illogical!

— Kostas in Chapter 2 against Claude.

Critical quotes

Hate me yet?
— Kostas
— Kostas
— Kostas
Just die already!
— Kostas

Death quotes

I should have never listened to that idiot... What a mistake...
— Kostas in Chapter 2

Other appearances

Etymology and other languages

Names, etymology and in other regions
Language Name Definition, etymology and notes


A diminutive form of the Greek name Constantine, meaning "steadfast".






As above.



As above.



As above.



As above.




Simplified Chinese



Traditional Chinese





  This article is part of Project Characters, a project focused in writing articles for every character present in the Fire Emblem series.
Fire Emblem: Three Houses
Playable characters Black Eagles BernadettaCasparDorotheaEdelgardFerdinandHubertLinhardtPetra
Blue Lions AnnetteAsheDedueDimitriFelixIngridMercedesSylvain
Golden Deer ClaudeHildaIgnatzLeonieLorenzLysitheaMarianneRaphael
Other AloisAnna*BylethCatherineCyrilFlaynGilbertHannemanJeritza*ManuelaSetethShamir
Ashen Wolves* BalthusConstanceHapiYuri
Non-playable characters Abysskeeper*Duke AegirDuke GerthFlecheGatekeeperGlennHolstIonius IXJeraltJudithLadislavaLambertLord ArundelMonicaNaderPatriciaRandolphRheaRodrigueRufusSeirosSitriSothisTomasTiana
Bosses AcheronAelfric*AloisBaron Ochs*BiasBlaiddydCasparCatherineCharonChilonClaudeCorneliaDaphnelDedueDeath KnightDimitriDominicEdelgardFelixFerdinandFlame EmperorFlaynFraldariusGautierGloucesterGonerilGwendalHubertIngridThe Immaculate OneThe ImmovableJudithKostasKronyaLadislavaLamineLinhardtLonatoLord ArundelLorenzMercedesMetodeyMiklanMysonNaderNemesisOdessePallardóPittacusRandolphRheaRieganRodrigueSetethShamirSolonSylvainThalesWandering BeastThe Wind Caller
Personal weapons and regalia Aegis ShieldAreadbharAsclepiusAthameAxe of UkonvasaraAymrBlutgangCaduceus StaffCirce StaffCrusherFailnaughtFetters of DromiFreikugelThe InexhaustibleLance of RuinLúinOchain ShieldRafail GemScythe of SarielSeiros ShieldSpear of AssalSword of BegaltaSword of MoraltaSword of SeirosSword of the CreatorTathlum BowThunderbrandThyrsusVajra-Mushti
Chapters Part I
Prologue: An Inevitable Encounter • 1: Three Houses • 2: Familiar Scenery • 3: Mutiny in the Mist • 4: The Goddess's Rite of Rebirth • 5: Tower of Black Winds • 6: Rumors of a Reaper • 7: Field of the Eagle and Lion • 8: The Flame in the Darkness • 9: The Cause of Sorrow • 10: Where the Goddess Dwells • 11: Throne of Knowledge • 12: To War     / Outset of a Power Struggle  
Part II Silver Snow
13: Reunion at Dawn • 14: A King Without a Kingdom • 15: Valley of Torment • 16: The Rose-Colored River • 17: The Impregnable Fortress • 18: The Chaos of War • 19: Conclusion of the Crossing Roads • 20: The City Without Light • 21: Following a Dream
Azure Moon
13: Reunion at Dawn • 14: The Delusional Prince • 15: Valley of Torment • 16: The Rose-Colored River • 17: Blood of the Eagle and Lion • 18: The King's Triumphant Return • 19: The Golden Deer's Plea • 20: The Impregnable Fortress • 21: Our Chosen Paths • 22: Oath of the Dagger
Verdant Wind
13: Reunion at Dawn • 14: The Alliance Leader's Ambitions • 15: Valley of Torment • 16: The Rose-Colored River • 17: Blood of the Eagle and Lion • 18: The Golden Scheme • 19: The Chaos of War • 20: Conclusion of the Crossing Roads • 21: The City Without Light • 22: Fódlan's New Dawn
Crimson Flower
13: Beyond Escape • 14: The Master Tactician • 15: Tempest of Swords and Shields • 16: Lady of Deceit • 17: Field of Revenge • 18: To the End of a Dream
Paralogues   Part I A Cursed Relic*An Ocean ViewBlack Market Scheme*Death TollDividing the World    Falling Short of HeavenThe ForgottenLand of the Golden DeerOil and WaterRumored NuptialsThe Secret Merchant*   Sword and Shield of SeirosTales of the Red CanyonTrue ChivalryWar for the Weak  
Part II Darkness Beneath the Earth  Dividing the World    Eternal Guardian    The Face Beneath    Foreign Land and SkyForgotten HeroInsurmountable  Legend of the LakeRetribution    The Secret Merchant*  The Silver Maiden  The Sleeping Sand Legend  Weathervanes of Fódlan  
Cindered Shadows
(DLC side story)
1: The Fourth House • 2: What Lies Beneath • 3: The Rite of Rising • 4: Danger in the Dark • 5: Betrayal • 6: Return to Me • 7: Wolf Pack
Locations FódlanAbyssAdrestiaFaerghusGarreg Mach MonasteryLeicesterAlmyraBrigidDagdaSreng
Groups, objects and concepts 10 ElitesAshen WolvesBlack EaglesBlue LionsChildren of the GoddessChurch of Seiros (Knights of Seiros) • Crests (Crest Stone) • Divine PulseGolden DeerHeroes' RelicsInsurrection of the SevenMonstersThose who slither in the darkTragedy of DuscurWar of Heroes
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