This is a ranking page for the hero Chulainn - Unbeaten Warrior from the game Fire Emblem Heroes (FEH). Read on to learn the best IVs (Individual Values), best builds (Inherit Skill), weapon refinement, stats at Lv 40, and more for Chulainn.

Chulainn Rating and Basic Information

Chulainn - Unbeaten Warrior: Basic Information

Color / Weapon Type / Move Type	Red / Sword / Infantry
Rarity	4 Star 3 Star
What Kind of Character Are They?	・A 4★ free-to-play unit with competitive Atk and Spd. ・Campaign Blade+ creates a large Atk/Def stat swing and grants 10 HP post-combat healing.

Chulainn Skills at 5★

Campaign Blade+ Might: 14　 Range: 1 At start of combat, if unit's HP ≥ 25%, grants Atk/Def+5 to unit during combat, inflicts Atk/Def-X on foe during combat (X = 25% of unit's HP at start of combat; max 10), and restores 10 HP to unit after combat.

Luna Cooldown Count = 3 Treats foe's Def/Res as if reduced by 50% during combat.

Wind Boost 3 If unit has at least 3 more HP than enemy at the start of combat, unit receives Spd +6 during combat.

Spd/Def Bulwark 3 Foes with Range = 1 cannot move through spaces adjacent to unit, and foes with Range = 2 cannot move through spaces within 2 spaces of unit. (Does not affect foes with Pass skills.) Inflicts Spd/Def-4 on foe during combat. Restores 7 HP to unit after combat.

Chulainn Best IVs

Recommended IVs

Stat	Superboon/Superbane	IV Recommendation
HP (19)		★★★★☆
Atk (11)		★★★★★
Spd (11)		★★★★★
Def (10)		★★★☆☆
Res (6)		★☆☆☆☆

◯ = Stat gains +4 with a superboon, ✕= Stat goes down by -4 with a superbane, - = No assets or flaws

When using an Ascendant Floret, we recommend getting the next superboon if it fits the hero. If not, consider what stat your hero needs most.

Neutral IVs by default!

As a hero obtainable only through Grand Hero Battle, Chulainn will always have neutral IVs by default. The only way to access IVs for this unit is through using Trait Fruits.

+Spd / -Res

The best IVs for Chulainn are +Spd and -Res. Chulainn's Spd is quite high for a free unit at base 46, and boosting it can prevent his foes from generating follow-up attacks against him.

+Def for a bulky build is also good, as with his base 40 Def (raised to base 44 with a superboon), he can soak up physical attacks quite well.

Chulainn's Res is a clear dump stat at only base 21 and can be safely taken as a bane without altering any of his matchups.

+Spd for a +10 merge

We recommend +Spd when merging Chulainn up to +10 to protect him from receiving follow-up attacks against fast metagame foes.

Chulainn Best Builds

Godsword Chulainn

HOT
： Arcane Devourer ： Reposition Gait ： Godlike Reflexes ： -	： Atk/Spd Finish 4 ： Laguz Friend 4 ： Spd Smoke 4 ： Squad Ace BS 3 ： D Counter Echo
Updated on 01/07/2025

How to Use, Explanation

This is a Godsword build aimed at using Chulainn's high Spd and Def to soak attacks together with Godlike Reflexes and Laguz Friend 4.

Budget (Divine Codes) Chulainn

： Campaign Blade+ ： Reposition ： Luna ： -	： Atk/Spd Ideal 4 ： Spd/Def Bulwark 3 ： Atk/Spd Oath 4 ： Squad Ace BS 3 ： -
Updated on 01/07/2025

How to Use, Explanation

This is a cheaper fast Sword Infantry build using skills available from Divine Codes.

Source Heroes for All Skills

Chulainn Stats

Stat Rankings

Neutral Stats at Lv. 40 (5★)
198
HP	45	Rank: 115/1195
Atk	46	Rank: 57/1195
Spd	46	Rank: 72/1195
Def	40	Rank: 101/1195
Res	21	Rank: 972/1195

Stat Values

Lv 40+10 Stats (5★)

Stats at Lv 40

Initial Stats (with Skills)

Stat Comparison of Similar Heroes

Hero	HP	Atk	Spd	Def	Res	Total
Aided Dagr	41	46	48	38	31	204
Brave Felix	40	47	48	35	29	199
Chulainn	45	46	46	40	21	198
Ogier	46	44	47	36	24	197
Inigo	40	44	45	34	30	193
Brave Robin (M)	40	46	45	35	27	193
Severa	42	43	47	37	24	193
Emblem Marth	41	45	47	33	27	193
Fallen Lloyd	41	43	46	31	32	193
Edward	40	43	46	43	21	193
Kagetsu	42	43	47	35	25	192
Lapis	41	41	45	29	32	188
Summer Fjorm	43	43	46	28	28	188
Fallen Byleth (F)	40	44	47	32	25	188
Felix	40	46	46	31	25	188
Lumera	43	43	43	33	25	187
Alear (M)	40	44	45	33	25	187
Ascended Fir	42	44	46	34	21	187
Lucia	40	41	45	29	32	187
Alear (F)	40	43	46	32	26	187
Malice	40	39	43	32	28	182
Ascended Mareeta	40	40	43	34	25	182
Galzus	40	43	41	36	22	182
Yen'fay	43	37	42	32	28	182
Priam	40	41	40	35	26	182
Brave Marth	41	41	43	32	25	182
Flavia	41	40	41	36	23	181
Kamui	44	38	41	36	22	181
Duo Eirika	40	36	43	30	28	177
Ninja Zihark	43	37	42	30	24	176
Catherine	43	39	41	30	23	176
Kris (M)	40	37	40	30	25	172
Say'ri	40	35	40	23	34	172
Young Marth	41	36	37	32	26	172
Larcei	41	36	40	30	25	172
Mareeta	41	35	42	31	23	172
Fallen Mareeta	42	33	41	29	23	168
Byleth (F)	40	34	40	33	21	168

Note: Stats bonuses from skills are not taken into account.

Chulainn Roles, Strengths, and Weaknesses

Chulainn Roles

Chulainn - Unbeaten Warrior Roles
Close-Physical	Ranged-Physical	Close-Magic	Ranged-Magic
Physical Wall	Magic Wall	Effective Weapon	Movement Assist
Exclusive Skill	All-Range Counter	Recovery	Refresher
Legendary	Mythic	Duo / Harmonized	Resplendent

Chulainn is a close physical attacker (range = 1). Therefore, when not accounting for the Weapon Triangle, the amount of damage he deals will be equivalent to his Atk minus the foe's Def stat.

Chulainn Strengths

High Spd and Def for a F2P unit

Chulainn's base 46 Spd and base 40 Def are quite high for a free unit, making him a flexible unit that can be built for specific situations.

A high Spd build is possible just like every other high Spd Sword Infantry unit in the game, but Chulainn can also opt for a high Def build with his base 44 (after a superboon) Def.

Build your Chulainn based on your team's needs.

Campaign Blade+ creates a large stat swing

Chulainn's inheritable Campaign Blade+ grants him Atk/Def+5 during combat, inflicts up to Atk/Def-10 onto his foe, and grants him 10 HP post-combat healing.

While not as exciting as Arcane or exclusive weapons, it gets the job done by granting Chulainn physical stats and healing to keep him healthy throughout multiple combats.

This is a good inheritable weapon based on Chulainn's statline, giving him the bulk and sustain he needs to soak physical attacks.

Chulainn Weaknesses

Lack of Unique Skills

Chulainn suffers from not having any unique skills to call his own, making him unable to stand out amongst other units.

Sword Infantry units are quite abundant in the game, and lacking an exclusive weapon makes Chulainn replaceable by better units.

Low Res

Chulainn's base 21 Res leaves him incredibly weak to magic damage and adaptive damage from heroes like Brave Felix.

Keep him away from foes that attack his Res stat to ensure his survival.

Should you Unlock Potential?

Should You Unlock Potential for this Hero?

We Recommend Unlocking Potential for Chulainn - Unbeaten Warrior!

We recommend that you use Unlock Potential to bring Chulainn - Unbeaten Warrior from 4 Stars to 5 Stars. Chulainn - Unbeaten Warrior is very useful as a high BST sword infantry, so you may find using Unlock Potential on Chulainn - Unbeaten Warrior helpful if your team lacks a party member with this role.

Unlock Potential Tier List

Chulainn - List of Skills

Weapons

Skill Name	Might	Range	Effect	Learned At
Iron Sword	6	1	No Effect	3★
Steel Sword	8	1	No Effect	3★
Campaign Blade	10	1	At start of combat, if unit's HP ≥ 25%, grants Atk/Def+5 to unit during combat, inflicts Atk/Def-X on foe during combat (X = 25% of unit's HP at start of combat; max 10), and restores 10 HP to unit after combat.	3★
Campaign Blade+	14	1	At start of combat, if unit's HP ≥ 25%, grants Atk/Def+5 to unit during combat, inflicts Atk/Def-X on foe during combat (X = 25% of unit's HP at start of combat; max 10), and restores 10 HP to unit after combat.	5★

Assists

Specials

Skill Name	Effect	Learned At
New Moon	(Cooldown Count = 3) Resolve combat as if foe suffered Def/Res -30%.	3★
Luna	(Cooldown Count = 3) Treats foe's Def/Res as if reduced by 50% during combat.	4★

Passives

Skill Name	Effect	Learned At
Wind Boost 1	If unit has at least 3 more HP than enemy at the start of combat, unit receives Spd +2 during combat.	3★
Wind Boost 2	If unit has at least 3 more HP than enemy at the start of combat, unit receives Spd +4 during combat.	3★
Wind Boost 3	If unit has at least 3 more HP than enemy at the start of combat, unit receives Spd +6 during combat.	4★
Spd/Def Bulwark 1	Foes with Range = 1 cannot move through spaces adjacent to unit, and foes with Range = 2 cannot move through spaces within 2 spaces of unit. (Does not affect foes with Pass skills.) Inflicts Spd/Def-2 on foe during combat. Restores 3 HP to unit after combat.	3★
Spd/Def Bulwark 2	Foes with Range = 1 cannot move through spaces adjacent to unit, and foes with Range = 2 cannot move through spaces within 2 spaces of unit. (Does not affect foes with Pass skills.) Inflicts Spd/Def-3 on foe during combat. Restores 5 HP to unit after combat.	4★
Spd/Def Bulwark 3	Foes with Range = 1 cannot move through spaces adjacent to unit, and foes with Range = 2 cannot move through spaces within 2 spaces of unit. (Does not affect foes with Pass skills.) Inflicts Spd/Def-4 on foe during combat. Restores 7 HP to unit after combat.	5★

Chulainn as a Source Hero

Chulainn has Campaign Blade+, Wind Boost 3, and Spd/Def Bulwark 3 as inheritable options.

Spd/Def Bulwark 3 is a good tier 3 skill and can be either given over to other budget build units or used as bridge fodder in case S/D Spiked Wall gets released.

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How to Get Chulainn / Illustrations / Voice Actor / Quotes

How to Get Chulainn

Obtain through a Grand Hero Battle

Chulainn is a Hero who, for a limited time, can be obtained through completing a Grand Hero Battle for the first time. They do not appear in regular summons. After the event has ended, they can be obtained by using Heroic Grails.

Voice Actor and Illustrator Information

Illustration

FEH: Related Guides

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All Types of Red Weapons

Close-Range	Ranged
Sword	Red Tome
Red Breath	Red Dagger
Red Beast	Red Bow