Cu Chulainn

Max HP 9,593
HP Rank
Max ATK 7,239
ATK Rank
Base Atk1,344Base HP1,726
Max Atk 7,239 Max HP 9,593
Grail Atk 9,797 Grail HP 13,007
Stat Ratings
Craft Essence Recommendation
  • Imaginary Around / Gandr / After-Party Order: If players look to increase Cu's damage output, then these Craft Essences would do quite well on him as he mainly use his NP, Quick and Buster cards for damage
  • GUDAGUDA Poster Girl / Halloween Arrangement: Thanks to Protection from Arrows, Cu is an extremely durable Servant and can make a decent Taunter with these CEs, particularly for hard quests if players want to protect another Servant.
  • Iron-Willed Training / Holy Shroud of Magdalene: Improves his already great bulk
Level Up Skill Recommendation

Cu Chulainn is a fairly straightforward Servant and his skill leveling order is just as simple due to his skills having a clear distinction on which ones are more useful.

Divine Protection from Arrows should be maxed first, in conjunction with Battle Continuation as these two are the things that give him incredible staying power. With the reduced cooldowns on both skills, it is not rare to see Cu Chulainn always have dodge AND guts status on him for the majority of the battle, making him a very durable tank for the team. Disengage, while doesn't give as much utility as the other two skills, is still worthwhile to level as it is also a fairly good skill for a lengthy battle with the debuff cleanse and heals every 5 turns.

Suggested Servant Synergies

As a survivalist expert, Cu Chulainn (F/SN) is a pretty self contained servant.

  • Cu Chulainn (Prototype) and Cu Chulainn (Caster): The Cu Chulainn team isn’t a meme for no reason. With a 3 hit dodge on Protection from Arrows and a 5 turn cooldown at max rank (plus a sizable defense buff built in), this team is a valid strategy for certain quests due to the nigh invulnerability of the Cu Chu Train. However, this composition falls apart with AoE-as-normal-attack bosses, which tend to become more common in the future. Their strength lies not particularly in damage, but in distributing hits between the three of them such that once their dodges are exhausted, Protection from Arrows comes off of cooldown. Similarly, Marie and Hassan for differences in class advantage.

  • Atalante: As the only servant with quick buff currently, Atalante is invaluable if you want to go the route of boosting Cu Chulainn’s damage. The maximum 50% Quick buffs will affect up to 3 of Cu Chulainn’s cards, including his Noble Phantasm. Additionally, the more or less 50+ stars from Atalante’s NP will guarantee a crit from Cu Chulainn the next turn.

Interlude Quests
Quest Ascen. Bond Reward
Chapter Completion: Septem
1 1
✔ = Available ✖ = Unavailable
Servant Skills
Battle Continuation A

Grants self guts status for 5 turns.

Revives with 1000 HP1150 HP1300 HP1450 HP1600 HP1750 HP1900 HP2050 HP2200 HP2500 HP
CD 9 9 9 9 9 8 8 8 8 7

Available from the start

Divine Protection from Arrows B

Grants self evasion for 3 hits.
Increases own defense for 3 turns.

Defense + 8%8.8%9.6%10.4%11.2%12%12.8%13.6%14.4%16%
CD 7 7 7 7 7 6 6 6 6 5

Unlocks after 1st Ascension

Disengage C

Removes own debuffs.
Recovers own HP.

Heal + 50060070080090010001100120013001500
CD 7 7 7 7 7 6 6 6 6 5

Unlocks after 3rd Ascension

Class Skills
Magic Resistance C

Increases debuffs resistance by 15%.

Divinity B

Increase damage dealt by 180.

Noble Phantasm
Gae Bolg
Barbed Spear that Pierces with Death

Deals damage to a single enemy.

Overcharge Effect

Chance to cause instant death.
Reduces defense (3 turns).

Level 1 2 3 4 5
Damage + 1200% 1600% 1800% 1900% 2000%
Charge 100% 200% 300% 400% 500%
Defense - 10% 15% 20% 25% 30%
Death Chance 50% 62.5% 75% 87.5% 100%
Ascension Materials
Skill Enhancement Materials
1 → 2 50,000
2 → 3 100,000
3 → 4 300,000
4 → 5 400,000
5 → 6 1,000,000
6 → 7 1,250,000
7 → 8 2,500,000
8 → 9 3,000,000
9 → 10 5,000,000
Unit Info
Star Info
Star Absorption87
Star Generation12.1%
NP Info
NP Charge per Hit (%)1.07%
NP Charge when Attacked (%)4%
Hits Info
# of Hits (A)2
# of Hits (B)1
# of Hits (Q)2
# of Hits (EX)3
Traits Info
Trait 1HumanoidTrait 6Weak to System Keuranos
Trait 2ServantTrait 7
Trait 3DivineTrait 8
Trait 4Brynhildr's BelovedTrait 9
Trait 5Weak to Enuma ElishTrait 10
Death Info
Instant Death Chance32.00%
Other Info
Release HistorySince Launch
AKAs/Aliases/(Fan) NicknamesSetanta, Lancer, FSN Cu, Bro Cu, Cu Lancer, Dog, etc.
AlignmentLawful Neutral
Country/Place of OriginIreland
IllustratorTakeuchi Takashi
Seiyuu (CV)Nobutoshi Canna
SeriesFate/stay night


by Horus (not verified) 4 months 3 weeks ago

Can you add his CE recommendation?

by Aidost (not verified) 2 months 2 weeks ago

please add the CE suggestions

by Niko (not verified) 2 months 1 week ago

Craft Essence?

by PShine (not verified) 2 months 1 week ago

Both GUDAGUDA Poster Girl and After-Party Order are excellent CEs for him. Fittingly enough, so is Imaginary Around.

by Anonymous (not verified) 1 month 3 weeks ago

How 'bout some overview for the Cú Dog.
What's his weaknesses(as if there's any lol jk) and strenghts...

by Alex (not verified) 1 month ago

Holy Night Sign (Christmas CE) is also good on him, the 10% Quick + 20% critical strength is nice on him. Plus since it's an event CE more people will have it compared to say Imaginary Around.

by Anonymous (not verified) 3 weeks ago

For those who don't know, it's pronounced "Ku Kullen."
So "Cu Chu Train" is funny, but doesn't actually work.

by Anonymous (not verified) 6 days ago

Wouldn't Shishou be good as far as synergy goes with Cu?

by Julyann (not verified) 5 days 3 hours ago

Isn't his NP better that scatatch? Due to his NP having an easier to get NP lvl 5??? Well besides the fact that Scatach's has a sure stun???

If you ignore the fact that Scath has better attack, an easier time generating stars by herself (which means faster NP gen with more frequent crits), a quick card boost of her own that will boost her Quick Card NP damage, and the ridiculous level of usefulness that there is in being able to stun even bosses on demand (as long as NP is charged of course), than sure maybe. But just comparing NPs (and only focusing on two specific qualities of them at that) doesn't mean anything when the servants don't even perform the same function (Scath is a Quick/Crit DPS with multihit buster+ST NP with added stun utility and Cu is an "anchor" duelist for closing out tough boss fights with his high survivability that can't fill in for the high DPS role, benefiting much less from support buffs)in the first place.

by Ran (not verified) 3 days 23 hours ago

i like how he has a lot of nicknames that it got "etc" ady lol

best dog

by SoraRaion (not verified) 3 days 6 hours ago

100% of dead is a fraud...

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