Diarmuid ua Duibhne

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Base Atk1,277Base HP1,817
Max Atk 6,877 Max HP 10,098
Grail Atk 9,307 Grail HP 13,691

Stat Ratings

Attack / HP Growth


Diarmuid is a Quick-oriented Lancer, but beyond that, his kit is a bit all over the place. His main niche is the buff removal effect packed into his NP, but he lacks the tools to make it his mainstay in the way Medea, his fellow 3 star, can with his own kit. His NP gain is worse than his fellow Lancers and also worse than most of the released cast due to his base NP gain being approximately 10% lower than an average 2 hit Arts BBAAQ unit, while lacking the hit counts to compensate.

While Diarmuid is pretty durable on the whole, he doesn’t offer anything to make him worthwhile being on the field, let alone being kept alive. His damage output, even with his NP interlude, is pitiful and despite being focused on Quick cards he can’t produce them much more than an Archer like Atalante or Robin can, both of whom offer much more to their team aside from stars. On the whole, there’s one Witch of Colchis and two dogs which can do whatever you wanted out of Diarmuid much better.


  • Buff removal NP is a rare niche which can demolish some of the more annoying servants to face up against.
  • With a dodge skill and a (admittedly very situational) strong enemy attack debuff, Diarmuid is relatively hard to kill.


  • Lack of a damage steroid and low base attack means he won’t be hitting hard, even with his NP interlude.
  • His low NP gain makes using his NP as effectively as Medea can difficult, limiting his niche.
  • While his durability is good, both Cu varieties are better at it than him, making it kind of obsolete.

Craft Essence Recommendation

  • Kaleidoscope / Imaginary Element – If you need a buff removal and you don’t have Medea, then you’ll need Diarmuid and one of these CE’s. He’s probably a waste of the Kaleidoscope, but at a minimum it lets him contribute beyond slapping people with his attack stat.
  • Imaginary Around / Gandr – Makes Diarmuid’s, well, everything a bit more bearable. His stargen will still be bad, but his NP gain and damage output becomes a lot more respectable with this CE.
  • A Fragment of 2030 – The first rule of 2030 is you put it on whoever actually does the least for your team. In most cases this is bound to be Diarmuid, and it lets him contribute the stars he normally can’t produce, huzzah!

Level Up Skill Recommendation

When it comes to Diarmuid's skill leveling, there is only one rule: simply don't. Being an exceptionally bad Servant with two terrible skills means that most people can tell at a first glance that one should not spend any of precious ascension resources on this guy unless you really like him. If one is somehow unfortunate enough to be charmed by Diarmuid's love spot, then go with an order of 1 -> 2 -> 3 to salvage as much utility as you can get from him.

Suggested Servant Synergies

  • Asterios: Against females, Diarmuid can reduce their attack by up to 50%.  Asterios post-interlude can reduce attack by 60%.  With the amount of female Servants in the game, they can nullify not only one, but all female enemies’ NP.  

  • Medea: If you’re fighting enemies who constantly buff themselves, Diarmuid serves as a pretty good insurance for Medea’s debuff removal downtime.  Additionally, her triple Arts deck indirectly alleviates a bit of Diarmuid’s NP gain problems by making arts chains more likely.

  • Cu Chulainn: Although Cu is a better generalist than Diarmuid in FGO, there’s no reason to not use the both of them together.  Diarmuid’s strong attack debuff can help Cu get more mileage out of disengage when Protection from Arrows is on cooldown.

Interlude Quests

Quest Ascen. Bond Reward
Interlude 1
Chapter Completion: London
1 2
✔ = Available ✖ = Unavailable

Servant Skills

Mind's Eye (True) B

Grants self Evasion for 1 turn.
Increases own defense for 3 turns.

Show Info
Defense + 9%9.9%10.8%11.7%12.6%13.5%14.4%15.3%16.2%18%
CD 8 8 8 8 8 7 7 7 7 6

Available from the Start

Love Spot C

Reduces all Female enemies' attack for 1 turn.

Show Info
Attack - 30%32%34%36%38%40%42%44%46%50%
CD 7 7 7 7 7 6 6 6 6 5

Unlocks after 1st Ascension

Unlocks after 3rd Ascension

Class Skills

Magic Resistance B

Increase your Debuff Resist by 17.5%.

Noble Phantasm

Gae Dearg & Gae Buidhe B

Crimson Rose of Exorcism & Yellow Rose of Mortality

Deal damage to one enemy.
Remove buffs.

Overcharge Effect

Inflict curse (5 turns).

Level 1 2 3 4 5
Damage + 1200% 1600% 1800% 1900% 2000%
Charge 100% 200% 300% 400% 500%
Curse Damage + 500 750 1000 1250 1500

Gae Dearg & Gae Buidhe B+

Crimson Rose of Exorcism & Yellow Rose of Mortality

(Upgrades via Interlude Quest)
Deal damage to one enemy.
Removes buff.

Overcharge Effect

Inflict Curse (5 turns).

Level 1 2 3 4 5
Damage + 1600% 2000% 2200% 2300% 2400%
Charge 100% 200% 300% 400% 500%
Curse Damage + 500 750 1000 1250 1500

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 Generation12.3%

NP Info

NP Charge per Hit (%)0.79%
NP Charge when Attacked (%)4%

Hits Info

# of Hits (A)2
# of Hits (B)2
# of Hits (Q)2
# of Hits (EX)4

Traits Info

Trait 1HumanoidTrait 6
Trait 2ServantTrait 7
Trait 3Weak to Enuma ElishTrait 8
Trait 4Brynhild's BelovedTrait 9
Trait 5Heaven or EarthTrait 10

Death Info

Instant Death Chance36.00%

Other Info

Release HistoryScathach Campaign
AKAs/Aliases/(Fan) Nicknames Knight of Fianna
AlignmentLawful Balanced
Country/Place of OriginIreland
Seiyuu (CV)Hikaru Midorikawa