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Fire Emblem Heroes (FEH)

Summer Heiðrún Builds and Best IVs

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★ Latest Banners - New Heroes: Harmonized CYL Ike, Lyn
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FEH Summer Heiðrún Banner

This is a ranking page for the hero Heiðrún - Peaceful Horizon 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 Summer Heiðrún.

Heroes With the Same Name
Heiðrún - Peaceful Horizon Icon Summer Heiðrún

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Summer Eikþyrnir IconSummer Eikþyrnir
[9.5/10]
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[9.5/10]
Summer Yuri IconSummer Yuri
[9.5/10]
Summer Heiðrún IconSummer Heiðrún
[9.5/10]

Summer Heiðrún Rating and Basic Information

FEH Summer Heiðrún Banner

Overall Rating 9.5/10
Reroll Ranking (excluding Inherit Skill) S
(▶Reroll Ranking)
Ranking (including Inherit Skill) S
(▶FEH Tier List)

Heiðrún - Peaceful Horizon: Basic Information

Color / Weapon Type / Move Type
Rarity
What Kind of Character Are They? ・Tropical Nectar has built-in Distant Counter, grants allies within 3Rx3C Atk/Def/Res+5, Atk/Def/Res penalty neutralization, and a guaranteed follow-up, grants Heiðrún up to Atk/Def/Res+14, a guaranteed follow-up, bonus true damage and true DR, and neutralizes Heiðrún's Atk/Def/Res penalties.
・Sweet Nectar has a built-in Bulwark effect, grants 【Divine Nectar】 to Heiðrún and nearby allies at the start of each phase, grants Atk/Def/Res+5 and +7 bonus true damage to Heiðrún.

Summer Heiðrún Skills at 5★


Might: 14  Range: 1
Accelerates Special trigger (cooldown count-1).
Unit can counterattack regardless of foe's range.
For allies within 3 rows or 3 columns centered on unit, grants Atk/Def/Res+5, neutralizes ally's penalties to Atk/Def/Res, and ally makes a guaranteed follow-up attack during combat.
If unit is transformed or if foe initiates combat, grants bonus to unit's Atk/Def/Res = number of allies within 3 spaces of unit x 3, + 5 (max 14), neutralizes unit's penalties to Atk/Def/Res, unit makes a guaranteed follow-up attack, deals damage = 20% of unit's Res (excluding area-of-effect Specials), and reduces damage from foe's attacks by 20% of unit's Res during combat (excluding area-of-effect Specials).
At start of turn, if unit is adjacent to only beast or dragon allies or if unit is not adjacent to any ally, unit transforms (otherwise, unit reverts). If unit transforms, grants Atk+2, deals +7 damage when Special triggers, and neutralizes effects that grant "Special cooldown charge +X" to foe or inflict "Special cooldown charge -X" on unit.

Cooldown Count = 4
Boosts damage by 70% of unit's Res when Special triggers.
If unit's or foe's Special is ready, or unit's or foe's Special triggered before or during this combat, and also, if unit's Res ≥ foe's Res-10, reduces damage from foe's next attack by 40% (once per combat; excluding area-of-effect Specials).

If unit can transform, transformation effects gain "if unit is within 2 spaces of a beast or dragon ally, or if number of adjacent allies other than beast or dragon allies ≤ 2" as a trigger condition (in addition to existing conditions).
If defending in Aether Raids, at the start of enemy turn 1, if conditions for transforming are met, unit transforms.
If unit is transformed or if foe initiates combat, grants Def/Res+8 to unit and neutralizes foe's bonuses to Atk/Def during combat, and restores 7 HP to unit after combat.

Inflicts Atk-5 on foe during combat.
If unit's max Special cooldown count value ≥ 3 and unit's attack can trigger unit's Special, or if foe's attack can trigger unit's Special, reduces the percentage of unit's non-Special "reduce damage by X%" skills by 50% (excluding area-of-effect Specials), reduces damage from foe's attacks by 20% of the greater of unit's Def or Res (excluding area-of-effect Specials), and grants Special cooldown count-2 to unit before foe's first attack during combat.
During combat, if unit's max Special cooldown count value ≥ 3 and unit's attack can trigger unit's Special, when Special triggers, deals damage = 20% of the greater of unit's Def or Res (excluding area-of-effect Specials) and neutralizes "reduces damage by X%" effects from foe's non-Special skills (excluding area-of-effect Specials).
During combat, if foe's attack can trigger unit's Special, unit's next attack deals damage = 20% of the greater of unit's Def or Res and neutralizes "reduces damage by X%" effects from foe's non-Special skills (resets at end of combat).

Foes with Range = 1 cannot move through spaces adjacent to unit (does not affect foes with Pass skills).
Foes with Range = 2 cannot move through spaces within 2 spaces of unit (does not affect foes with Pass skills).
At start of player phase or enemy phase, if unit is within 2 spaces of an ally, grants 【Divine Nectar】 to unit and allies within 2 spaces of unit for 1 turn.
If a Rally or movement Assist skill is used by an ally with the 【Divine Nectar】 effect active (excluding unit), grants another action to that ally (once per turn; if another effect that grants action to ally has been activated at the same time, this effect is also considered to have been triggered).
If unit is within 3 spaces of an ally, grants Atk/Def/Res+5 to unit, unit deals +7 damage (excluding area-of-effect Specials) and reduces damage from foe's attacks by 7 during combat (excluding area-of-effect Specials).

Summer Heiðrún Best IVs

Recommended IVs

Stat Superboon/Superbane IV Recommendation
HP (19) HP Superbane ★★★☆☆
Atk (13) Attack Bane ★★★★☆
Spd (3) No Spd IV ★☆☆☆☆
Def (13) Def Bane ★★★★☆
Res (9) Res Boon ★★★★★

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

See the IV Checker for All Units Trait Fruits—How to Change IVs

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.

+Res / -Spd

The best IVs for Summer Heiðrún are +Res and -Spd. Res is a superboon and boosts Heiðrún's Res from base 48 to base 52 and is also used in the calculation of Tropical Nectar's true damage and true damage reduction effects. It is Heiðrún's best boon by a huge margin.

Spd is a clear dump stat and can be safely taken as a bane.

+Res for a +10 merge

We recommend a +Res IV when merging Summer Heiðrún up to +10 for similar reasons above.

Summer Heiðrún Best Builds

General Use / Budget Summer Heiðrún

HOT
Assist Skill IconSwap
Special Skill IconIce Wall
Attuned Skill Icon: -
Updated on 07/08/2025

How to Use, Explanation

Summer Heiðrún excels as a support unit that can also dish out damage when necessary. Deflect Missile 3 is used to protect her from Desperation effects, notably from Emblem Lyn.

Source Heroes for All Skills

Summer Heiðrún Stats

Stat Rankings

Neutral Stats at Lv. 40 (5★)
199
HP
HP 41 41
Rank: 370/1322
Atk
Atk 46 46
Rank: 95/1322
Spd
Spd 18 18
Rank: 1161/1322
Def
Def 46 46
Rank: 40/1322
Res
Res 48 48
Rank: 9/1322

Stat Values

Lv 40+10 Stats (5★)

HP Atk Spd Def Res Total
+10 Merges W/ Skill Bonuses 46 65 22 51 52 236
Lv.40 +10 46 51 22 51 52 222

HP Atk Spd Def Res Total
+HP
Lv.40 +10
48 50 22 50 52 222
+Atk
Lv.40 +10
45 53 22 50 52 222
+Spd
Lv.40 +10
45 50 25 50 52 222
+Def
Lv.40 +10
45 50 22 53 52 222
+Res
Lv.40 +10
45 50 22 50 56 223

Stats at Lv 40

HP Atk Spd Def Res Total
5★- Adjusted for Skills 41 60 18 46 48 213
5★ Lv.40 41 46 18 46 48 199

Initial Stats (with Skills)

HP Atk Spd Def Res Total
5★ Lv.1 19 27 3 13 9 71

Stat Comparison of Similar Heroes

Hero
HP
Atk
Spd
Def
Res
Total
45 48 18 49 44 204
Summer Heiðrún Icon Summer Heiðrún
41 46 18 46 48 199
42 48 16 48 45 199
40 45 16 45 47 193
41 44 19 44 40 188
48 43 29 43 24 187
40 43 26 43 31 183
40 39 43 35 25 182
45 43 40 31 23 182
41 39 27 41 34 182
45 39 26 41 30 181
48 41 24 43 20 176
41 38 40 34 23 176
40 35 41 31 25 172
40 35 37 33 23 168
47 37 24 39 20 167
45 41 24 38 19 167
40 31 37 32 23 163

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

Summer Heiðrún Roles, Strengths, and Weaknesses

Summer Heiðrún Roles

Heiðrún - Peaceful Horizon Roles
Close Physical Attack ImageClose-Physical Ranged Physical AttackRanged-Physical Close Magic AttackClose-Magic Ranged MagicRanged-Magic
Physical Wall ImagePhysical Wall Magic Wall ImageMagic Wall Effective ImageEffective Weapon Movement Assist ImageMovement Assist
Exclusive Skill ImageExclusive Skill All Range Counterattack ImageAll-Range Counter RecoveryRecovery No Refresher ImageRefresher
No Legendary Hero ImageLegendary No Mythic Hero ImageMythic No Duo and Harmonized ImageDuo /
Harmonized
No Resplendent ImageResplendent

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

Summer Heiðrún Strengths

Tropical Nectar has built-in Distant Counter and provides great support

Summer Heiðrún Attack

Summer Heiðrún's exclusive weapon Tropical Nectar has built-in Distant Counter and grants allies within 3 rows and 3 columns centered on Heiðrún Atk/Def/Res+5, a guaranteed follow-up attack, and neutralizes their penalties to Atk/Def/Res in combat.

Tropical Nectar also grants Heiðrún up to Atk/Def/Res+14 based on the number of nearby allies, neutralizes Heiðrún's Atk/Def/Res penalties, grants Heiðrún a guaranteed follow-up attack, bonus true damage equal to 20% of her Res, and true damage reduction equal to 20% of her Res.

Tropical Nectar also has the standard Infantry Beast transformation effects which include Atk+2, +7 bonus true damage on Special trigger, and a Tempo effect.

Tropical Nectar is a complete weapon, having offensive, defensive, and supportive effects, making Heiðrún useful in most cases.

Sweet Nectar has built-in Bulwark and grants 【Divine Nectar】

Summer Heiðrún's exclusive C skill Sweet Nectar has a built-in Bulwark effect, preventing foes from moving past spaces near Heiðrún.

Sweet Nectar also grants 【Divine Nectar】 to Heiðrún and nearby allies at the start of both player and enemy phase, and also grants an extra action to the first ally with 【Divine Nectar】 that uses a Rally or movement Assist. This effect is similar to other Heiðrún variants, granting the powerful 【Divine Nectar】 status and an extra action to an ally.

Sweet Nectar also grants Heiðrún Atk/Def/Res+5, +7 bonus true damage, and +7 bonus true damage reduction in combat if Heiðrún is within 3 spaces of an ally, providing a small boost to her combat potential.

Sweet Nectar is the perfect frontline skill, granting offensive, defensive, and supportive effects while preventing foes from reaching the backline with its Bulwark effect.

List of Status Effects: Bonuses and Penalties

Summer Heiðrún Weaknesses

Weak to Beast Effective Weapons

Summer Heiðrún takes 1.5x damage from beast-effective weapons like Brave Eliwood's Nini's Ice Lance or Picnic Flora's Sæhrímnir, and one blow from this type of weapon will deal significant damage. Make sure you know what weapons you are up against before hopping too far into the line of battle!

Heroes with Effective Skills

Should you Unlock Potential?

Should You Unlock Potential for this Hero? Cannot Unlock Potential

Heiðrún - Peaceful Horizon Only Appears as a 5 Star Hero!

Heiðrún - Peaceful Horizon only appears as a 5 Star Hero. We will include whether or not you should Unlock Potential for Heiðrún - Peaceful Horizon if a 4 Star version is released!

Unlock Potential Tier List

Summer Heiðrún - List of Skills

Weapons

Skill Name Might Range Effect Learned At
4 1 At start of turn, if unit is adjacent to only beast or dragon allies or if unit is not adjacent to any ally, unit transforms (otherwise, unit reverts). If unit transforms, grants Atk+2 and deals +10 damage when Special triggers. 5★
6 1 At start of turn, if unit is adjacent to only beast or dragon allies or if unit is not adjacent to any ally, unit transforms (otherwise, unit reverts). If unit transforms, grants Atk+2 and deals +10 damage when Special triggers. 5★
9 1 At start of turn, if unit is adjacent to only beast or dragon allies or if unit is not adjacent to any ally, unit transforms (otherwise, unit reverts). If unit transforms, grants Atk+2 and deals +10 damage when Special triggers. 5★
14 1 Accelerates Special trigger (cooldown count-1).
Unit can counterattack regardless of foe's range.
For allies within 3 rows or 3 columns centered on unit, grants Atk/Def/Res+5, neutralizes ally's penalties to Atk/Def/Res, and ally makes a guaranteed follow-up attack during combat.
If unit is transformed or if foe initiates combat, grants bonus to unit's Atk/Def/Res = number of allies within 3 spaces of unit x 3, + 5 (max 14), neutralizes unit's penalties to Atk/Def/Res, unit makes a guaranteed follow-up attack, deals damage = 20% of unit's Res (excluding area-of-effect Specials), and reduces damage from foe's attacks by 20% of unit's Res during combat (excluding area-of-effect Specials).
At start of turn, if unit is adjacent to only beast or dragon allies or if unit is not adjacent to any ally, unit transforms (otherwise, unit reverts). If unit transforms, grants Atk+2, deals +7 damage when Special triggers, and neutralizes effects that grant "Special cooldown charge +X" to foe or inflict "Special cooldown charge -X" on unit.
5★

Assists

This Hero has no Assist skills that can be learned.

Specials

Skill Name Effect Learned At
(Cooldown Count = 4) Boosts damage dealt by 50% of unit’s Res. 5★
(Cooldown Count = 4) Boosts damage dealt by 80% of unit’s Res. 5★
(Cooldown Count = 4) Boosts damage by 70% of unit's Res when Special triggers.
If unit's or foe's Special is ready, or unit's or foe's Special triggered before or during this combat, and also, if unit's Res ≥ foe's Res-10, reduces damage from foe's next attack by 40% (once per combat; excluding area-of-effect Specials).
5★

Passives

Skill Name Effect Learned At
Grants Def/Res+X to unit during combat. (X = 2 x number of allies within 2 spaces + 1; max 3.) 5★
Grants Def/Res+X to unit during combat. (X = 2 x number of allies within 2 spaces + 1; max 5.) 5★
Grants Def/Res+X to unit during combat. (X = 2 x number of allies within 2 spaces + 1; max 7.) 5★
If unit can transform, transformation effects gain "if unit is within 2 spaces of a beast or dragon ally, or if number of adjacent allies other than beast or dragon allies ≤ 2" as a trigger condition (in addition to existing conditions).
If defending in Aether Raids, at the start of enemy turn 1, if conditions for transforming are met, unit transforms.
If unit is transformed or if foe initiates combat, grants Def/Res+8 to unit and neutralizes foe's bonuses to Atk/Def during combat, and restores 7 HP to unit after combat.
5★
If unit's max Special cooldown count value ≥ 3 and unit's attack can trigger unit's Special, or if foe's attack can trigger unit's Special, reduces the percentage of unit's non-Special "reduce damage by X%" skills by 50% (excluding area-of-effect Specials), reduces damage from foe's attacks by 5% of the greater of unit's Def or Res (excluding area-of-effect Specials), and grants Special cooldown count-2 to unit before foe's first attack during combat. During combat, if unit's max Special cooldown count value ≥ 3 and unit's attack can trigger unit's Special, when Special triggers, deals damage = 5% of the greater of unit's Def or Res (excluding area-of-effect Specials). During combat, if foe's attack can trigger unit's Special, unit's next attack deals damage = 5% of the greater of unit's Def or Res (boost resets at end of combat). 5★
If unit's max Special cooldown count value ≥ 3 and unit's attack can trigger unit's Special, or if foe's attack can trigger unit's Special, reduces the percentage of unit's non-Special "reduce damage by X%" skills by 50% (excluding area-of-effect Specials), reduces damage from foe's attacks by 10% of the greater of unit's Def or Res (excluding area-of-effect Specials), and grants Special cooldown count-2 to unit before foe's first attack during combat. During combat, if unit's max Special cooldown count value ≥ 3 and unit's attack can trigger unit's Special, when Special triggers, deals damage = 10% of the greater of unit's Def or Res (excluding area-of-effect Specials). During combat, if foe's attack can trigger unit's Special, unit's next attack deals damage = 10% of the greater of unit's Def or Res (boost resets at end of combat). 5★
If unit's max Special cooldown count value ≥ 3 and unit's attack can trigger unit's Special, or if foe's attack can trigger unit's Special, reduces the percentage of unit's non-Special "reduce damage by X%" skills by 50% (excluding area-of-effect Specials), reduces damage from foe's attacks by 15% of the greater of unit's Def or Res (excluding area-of-effect Specials), and grants Special cooldown count-2 to unit before foe's first attack during combat. During combat, if unit's max Special cooldown count value ≥ 3 and unit's attack can trigger unit's Special, when Special triggers, deals damage = 15% of the greater of unit's Def or Res (excluding area-of-effect Specials). During combat, if foe's attack can trigger unit's Special, unit's next attack deals damage = 15% of the greater of unit's Def or Res (boost resets at end of combat). 5★
Inflicts Atk-5 on foe during combat.
If unit's max Special cooldown count value ≥ 3 and unit's attack can trigger unit's Special, or if foe's attack can trigger unit's Special, reduces the percentage of unit's non-Special "reduce damage by X%" skills by 50% (excluding area-of-effect Specials), reduces damage from foe's attacks by 20% of the greater of unit's Def or Res (excluding area-of-effect Specials), and grants Special cooldown count-2 to unit before foe's first attack during combat.
During combat, if unit's max Special cooldown count value ≥ 3 and unit's attack can trigger unit's Special, when Special triggers, deals damage = 20% of the greater of unit's Def or Res (excluding area-of-effect Specials) and neutralizes "reduces damage by X%" effects from foe's non-Special skills (excluding area-of-effect Specials).
During combat, if foe's attack can trigger unit's Special, unit's next attack deals damage = 20% of the greater of unit's Def or Res and neutralizes "reduces damage by X%" effects from foe's non-Special skills (resets at end of combat).
5★
Foes with Range = 1 cannot move through spaces adjacent to unit (does not affect foes with Pass skills).
Foes with Range = 2 cannot move through spaces within 2 spaces of unit (does not affect foes with Pass skills).
At start of player phase or enemy phase, if unit is within 2 spaces of an ally, grants 【Divine Nectar】 to unit and allies within 2 spaces of unit for 1 turn.
If a Rally or movement Assist skill is used by an ally with the 【Divine Nectar】 effect active (excluding unit), grants another action to that ally (once per turn; if another effect that grants action to ally has been activated at the same time, this effect is also considered to have been triggered).
If unit is within 3 spaces of an ally, grants Atk/Def/Res+5 to unit, unit deals +7 damage (excluding area-of-effect Specials) and reduces damage from foe's attacks by 7 during combat (excluding area-of-effect Specials).
5★

Summer Heiðrún as a Source Hero

Summer Heiðrún Avatar

Value of Skills ★★★★★

Summer Heiðrún has Ice Wall, Def/Res Fortune, and Laguz Friend 4 as inheritable options.

All of these skills are worth inheriting onto your favorite units.

List of Source Heroes The Best Fodder Units

Community Feedback

How would you rate Summer Heiðrún?

Top tier hero. Must summon. 9
Votes
Summon if you need his/her hero archetype. 1
Votes
Summon if you like this hero. 2
Votes
Summon for his/her Skill Inheritance options. 1
Votes
Pass on this hero. 0
Votes

If you have feedback about this hero page, let us know in the comments section below!

How to Get Summer Heiðrún / Illustrations / Voice Actor / Quotes

How to Get Summer Heiðrún

Obtained through a Special Summoning Event!

Summer Heiðrún is a limited time Hero who can be pulled from a Special Heroes Summoning Event. They do not appear in regular summons.

Note: Not currently a featured hero in any Summon events.

Current Focuses and Which You Should Pull From

Voice Actor and Illustrator Information

Voice Actor
(English)
Cat Protano
Illustrator Sencha
Appears In

Illustration

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