

Introduction
Cú Chulainn (Alter) is a 5-star servant in Fate/Grand Order with the Earth attribute. Cú Chulainn (Alter)'s class is Berserker.
On the combined Fate/Grand Order tier list Cú Chulainn (Alter) is A tier, 47th of the 363 servants ranked, from where 3 community tier lists put Cú Chulainn (Alter).
Other servants in Fate/Grand Order with the Earth attribute: Abigail Williams, Abigail Williams (Summer), Achilles, Aesc the Rain Witch, Aesc the Savior, Altria Pendragon and 132 more.
Cú Chulainn (Alter)'s banners
All banners- 1 March 2026 to 3 March 2026CBC 2026 Cú Chulainn (Alter) Pickup Summon
- 16 March 2025 to 18 March 2025CBC 2025 Cú Chulainn (Alter) Pickup Summon
- 15 November 2024 to 17 November 2024Fifth Singularity Cú Chulainn (Alter) Pickup Summon
- 3 March 2024 to 4 March 2024White Day Spectacles Cú Chulainn (Alter) Pickup Summon
- 5 March 2023 to 6 March 2023Chaldea Boys Collection 2023 Cú Chulainn (Alter) Pickup Summon
- 22 January 2023 to 3 February 2023Farewell to Kamakura Cú Chulainn (Alter) Pickup Summon
- 25 April 2022 to 5 May 2022Revival: GUDAGUDA Final Honnoji 2021 Pickup 2 Summon (Daily)
- 28 February 2022 to 14 March 2022Chaldea Boys Collection 2022 Pickup Summon (Daily)
- 8 March 2021 to 22 March 2021Chaldea Boys Collection 2021 Pickup Summon (Daily)
- 2 November 2020 to 16 November 2020Interlude Campaign 7 Pickup Summon (Daily)
- 9 July 2020 to 15 July 2020Fate/Grand Order 2020 - 3rd Anniversary Singularity Pickup 2 Summon (Daily)
Profile
Cú Chulainn (Alter) is voiced by Nobutoshi Canna in Japanese. simadoriru drew him.
Stories
7Character details
The legendary warrior from the Ulster Cycle of Celtic Mythology.
A member of the Red Branch Knights and the strongest warrior of Ulster, he made his name by using the spear techniques taught to him by Scáthach, the ruler of the Land of Shadows.
Unlike his usual class, he has materialized as a Berserker.
Some factor has caused his equipment to change, and his personality to be altered as well.
His expression is cruel, his crimson spear has been mixed with black, and is overflowing with an ominous aura.
Profile 1
Height/Weight: 185cm, 72kg
Origin: Celtic Mythology
Region: Europe
Alignment: Chaotic-Evil
Sub-Attribute: Earth
Gender: Male
He uses his rune spells solely to enhance his physical powers.
Profile 2
Madness of the Spirits: A
The fierce roar from a rampaging Cú Chulainn awakens the spirits of the land, and shatter the minds of the opposing enemies. A type of mental interference.
The affected enemies will suffer temporary reduced strength and agility.
Profile 3
The altered and twisted form of Cú Chulainn, summoned by Queen Medb's wish.
He reigned as the Mad King and brought chaos upon the land of America.
This is not what his berserker form is supposed to be in life, nor how he is supposed to be when summoned as a Berserker.
When receiving the backup from the Holy Grail, his power surpasses his Lancer or Caster form.
Profile 4
『Gáe Bolg』
Rank: B++
NP Type: Anti-Army
Range: 5-50 Maximum Targets: 100
Gouging Piercing Spear of Carnage.
A homing demonic spear missile.
Cú Chulainn's original Noble Phantasm.
In his Alter state, he can throw it with such force that it is capable of destroying his own body, in exchange for damage and area of effect to be increased.
It can inflict Death on all enemies, and even enemies with Death resistance will suffer large amounts of damage.
(Since he uses rune spells to restore his destroyed body as he throws it, Cú Chulainn does not take any damage...as long as you don't count the unbelievable pain.)
Profile 5
『Curruid Coinchenn』
Rank: A
NP Type: Anti-Personnel (Self)
Range: - Maximum Targets: 1
The Beast of Crunching Deathtusk.
In his rage Cú Chulainn temporarily embodies the exoskeleton of the Curruid, a sea monster whose body was used to create the Gáe Bolg, and wears it like an armor.
An offensive-type bone armor. By wearing it, he increases his endurance and his strength parameter becomes EX.
He cannot use Gáe Bolg while activating this Noble Phantasm.
Additional profile
A Disaster-Class enemy found in Chapter Five.
At this point, since you are the main character, you might as well summon a certain Archer wearing a Mythological Mystic Code, and have the two of them fight in a mysterious space until the end of time.
So, how about it?
Stats
- HP196th of 41912,210
- ATK7th of 41912,805
- Star generation377th of 4195.1%
- Star absorption394th of 4199
- Death rate387th of 41952%
- NP gain per hit192nd of 4190.69%
- NP gain when hit1st of 4195%
At level 90. Each bar is measured against the highest value in the Fate/Grand Order roster, and the place is out of every servant with that stat, lowest first for Death rate.
HP and ATK by level
- HP
- ATK
Level 90 is the natural cap for a 5-star; 100 takes 10 Holy Grails and 120 another 20 grails plus Servant Coins, before Fou cards (up to 2,000 HP and 2,000 ATK) and Craft Essences.
Cards and generation
- Arts hits
- 3 (16/33/51%)
- Extra hits
- 5 (5/10/15/20/50%)
- Quick hits
- 4 (10/20/30/40%)
- Buster hits
- 3 (16/33/51%)
- Star generation
- 5.1%
- Star absorption
- 9
- Death rate
- 52%
- Party cost
- 16
- NP gain per hit (Arts / Quick / Buster / Extra)
- 0.69% / 0.69% / 0.69% / 0.69%
- NP gain when hit
- 5%
Skills
3
Madness of the Spirits A
Skill 1LevelDecrease Critical Rate (3 turns) & ATK (3 turns) for all enemies
- Critical Rate Down (all enemies, 3 turns)
- 50%
- C. Star Drop Rate Down (all enemies, 3 turns)
- 50%
- ATK Down (all enemies, 3 turns)
- 20%
- Cooldown
- 6 turns

Protection from Arrows C
Skill 2LevelApply Evade (2 times) & increase DEF (3 turns) for yourself
- DEF Up (self, 3 turns)
- 14%
- Cooldown
- 5 turns

Battle Continuation A
Skill 3LevelApply Guts for yourself (1 time, 5 turns)
- Guts (self, 5 turns, 1 time)
- 2500
- Cooldown
- 7 turns
Noble Phantasm
Curruid Coinchenn
Rank A+ · Anti-Personnel · 12 hits · strengthenedIncrease ATK (1 turn) <effect increases with Overcharge> & DEF (1 turn) <effect increases with Overcharge> for yourself + Remove DEF Buffs & deal significant damage to a single enemy
- ATK Up (self, 1 turn, by Overcharge)
- 30%
- DEF Up (self, 1 turn, by Overcharge)
- 30%
- Damage (one enemy)
- 1200%
Before the strengthening quest
Curruid Coinchenn
Rank A · Anti-Personnel · 12 hitsIncrease ATK (1 turn) <effect increases with Overcharge> & DEF (1 turn) <effect increases with Overcharge> for yourself + Deal significant damage to a single enemy
- ATK Up (self, 1 turn, by Overcharge)
- 30%
- DEF Up (self, 1 turn, by Overcharge)
- 30%
- Damage (one enemy)
- 1000%
Class and append skills
Slightly increase your Buster Card effectiveness
- Buster Up
- 6%
Apply Damage Plus for yourself
- ATK Plus
- 150
Increase Extra Attack Card's effectiveness by 50% for yourself
Begin battle with NP charged at 20% for yourself
Increase Critical Resistance against [Lancer] class by 30% for yourself
Increase Critical Strength by 30% for yourself
Apply a state that "reduces skill cooldown by 1 after using it" (1 time <2 times at Lv. 6-9, 3 times at Lv. 10>, goes into effect only 1 time per skill)
Ascensions and costumes
5
Ascension 1
Ascension 2
Ascension 3
Ascension 4- Glasses Spiritron Dress: Oval GlassesUnlock at "Dress Making" in Da Vinci Workshop
Materials
Ascension
- Ascension 1Materials:
Berserker Piece x5QP: 100,000 QP - Ascension 2Materials:
Berserker Piece x12
Evil Bone x22QP: 300,000 QP - Ascension 3Materials:
Berserker Monument x5
Claw of Chaos x6
Heart of the Foreign God x2QP: 1,000,000 QP - Ascension 4Materials:
Berserker Monument x12
Heart of the Foreign God x4
Tearstone of Blood x8QP: 3,000,000 QP
4,400,000 QP for all four ascensions.
Skill enhancement (one skill)
- Level 1 to 2Materials:
Gem of Berserker x5QP: 200,000 QP - Level 2 to 3Materials:
Gem of Berserker x12QP: 400,000 QP - Level 3 to 4Materials:
Magic Gem of Berserker x5QP: 1,200,000 QP - Level 4 to 5Materials:
Magic Gem of Berserker x12
Claw of Chaos x3QP: 1,600,000 QP - Level 5 to 6Materials:
Secret Gem of Berserker x5
Claw of Chaos x6QP: 4,000,000 QP - Level 6 to 7Materials:
Secret Gem of Berserker x12
Evil Bone x15QP: 5,000,000 QP - Level 7 to 8Materials:
Evil Bone x29
Serpent Jewel x5QP: 10,000,000 QP - Level 8 to 9Materials:
Serpent Jewel x15
Void's Dust x48QP: 12,000,000 QP - Level 9 to 10Materials:
Crystallized Lore x1QP: 20,000,000 QP
54,400,000 QP to take one skill from 1 to 10, 163,200,000 QP for all three. Append skills share the same table for their levels, paid in the same materials plus Servant Coins to unlock.
Append skill enhancement (one skill)
- Level 1 to 2Materials:
Gem of Berserker x5QP: 200,000 QP - Level 2 to 3Materials:
Gem of Berserker x12QP: 400,000 QP - Level 3 to 4Materials:
Magic Gem of Berserker x5QP: 1,200,000 QP - Level 4 to 5Materials:
Magic Gem of Berserker x12
Seed of Yggdrasil x6QP: 1,600,000 QP - Level 5 to 6Materials:
Secret Gem of Berserker x5
Seed of Yggdrasil x12QP: 4,000,000 QP - Level 6 to 7Materials:
Secret Gem of Berserker x12
Cursed Beast Gallstone x2QP: 5,000,000 QP - Level 7 to 8Materials:
Cursed Beast Gallstone x4
Stake of Wailing Night x18QP: 10,000,000 QP - Level 8 to 9Materials:
Stake of Wailing Night x54
Small Bell of Absolution x72QP: 12,000,000 QP - Level 9 to 10Materials:
Crystallized Lore x1QP: 20,000,000 QP
Palingenesis (Holy Grails)
- 1Level cap: 92QP: 10,000,000 QP
- 2Level cap: 94QP: 11,000,000 QP
- 3Level cap: 96QP: 12,000,000 QP
- 4Level cap: 98QP: 13,000,000 QP
- 5Level cap: 100QP: 15,000,000 QP
- 6Level cap: 102QP: 15,000,000 QP
- 7Level cap: 104QP: 15,000,000 QP
- 8Level cap: 106QP: 15,000,000 QP
- 9Level cap: 108QP: 15,000,000 QP
- 10Level cap: 110QP: 15,000,000 QP
- 11Level cap: 112QP: 15,000,000 QP
- 12Level cap: 114QP: 15,000,000 QP
- 13Level cap: 116QP: 15,000,000 QP
- 14Level cap: 118QP: 15,000,000 QP
- 15Level cap: 120QP: 0 QP
Each summon of this servant gives 90 Servant Coins.
Bond
- 20,000Bond 2: 30,000Bond 3: 32,000Bond 4: 50,000Bond 5: 200,000Bond 6: 630,000Bond 7: 970,000Bond 8: 1,290,000Bond 9: 1,695,000Bond 10: 2,785,000
Total bond points to reach each level.

Increase Cú Chulainn (Alter) (Berserker)'s NP Strength by 30% & apply Guts (1 time, restore 20% HP) only when he is equipped with this Craft Essence.
Voice lines
41Home (16)
- Birthday
- It seems today is an important day for you. That's all.
- During an Event
- I sense a disturbance.
- Conversation 1
- Come on, move...
- Conversation 2
- I am but a minor Ulster warrior. However, now that I'm your Servant, I'll do what I absolutely must.
- Conversation 3
- Master and Servant? Don't think too much about it, just point me at our enemy.
- Likes
- Why ask me what I like? What a waste of time.
- Dislikes
- It's not like I hate my enemies. I simply kill them. That's what a warrior does.
- About the Holy Grail
- The Holy Grail? Only fools entrust their wish to something they don't have. I'll give it a thought once we have it.
- Bond Level 1
- Don't stand so defenselessly in my presence. I just might gut you without thinking.
- Bond Level 2
- Don't think too hard about each Servant's personality. We're just weapons. If it's necessary, we can become your enemy at any moment.
- Bond Level 3
- The real Cú Chulainn? I guess if he was the light, then I would be the shadow. Switch me out if you have a problem with that.
- Bond Level 4
- I just take down enemies. There's nothing impure about it. So as long as you don't betray me, my spear will never fall on you.
- Bond Level 5
- Now that we've been together so long, do you at last understand me? Well, it doesn't matter. I am your spear, as always.
- Conversation 4
- I could never act like that. Not that I would want to.
- Conversation 5
- Phew, thank goodness. There are a few in this world I would rather not make my enemy.
- Conversation 6
- That's Medb, huh? I'd like her to stop hanging around me so much...but she's an ally, right? Then whatever.
Growth (5)
- Level up
- My spear just got sharper. Want to see?
- Ascension 2
- Hmm, very well.
- Ascension 1
- I feel most of my power has returned.
- Ascension 3
- To think you would trust me this much. [delay 3.6]I can't tell if you're brave or just a fool...
- Ascension 4
- This is it. There is no need for more. [id 702000_0_G051]You amaze me, Master...
First summon (1)
- Summon
- I am Cú Chulainn, summoned at your request! ...My color has nothing to do with you.
Event (18)
- Attack 1
- Kah!
- Attack 2
- Hmph!
- Attack 3
- There!
- Extra Attack
- There's no need for you to wake up again.
- Skill 1
- Fear me!
- Skill 2
- There won't be a next time.
- Battle Start 1
- Let's end this quickly.
- Battle Start 2
- It's time to kill.
- Victory 1
- Time to sleep...forever.
- Victory 2
- If you regret fighting me now, then you never should've stood before me.
- Damage 2
- Tch.
- Damage 1
- Ugh!
- Incapacitated 1
- I messed up...
- Incapacitated 2
- Damn you...
- Command Card 1
- Hmph.
- Command Card 2
- Right.
- Command Card 3
- Understood.
- Noble Phantasm Card
- This will be a massacre. None shall live.
My Room (1)
- Noble Phantasm
- Unleashing the curse. [id 702000_0_B051]I won't hold back, [id 702000_0_B052]trying to overcome this despair... [id 702000_0_B053]Curruid Coinchenn!
Voiced by Nobutoshi Canna. Illustrated by simadoriru.
Costumes
1Glasses Spiritron Dress: Oval Glasses
Cú Chulainn (Alter)'s glasses. The intellectual bad boy look really suits him.
Art
















