Seiros Builds and Best IVs | Fire Emblem Heroes (FEH)

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This is a ranking page for the hero Seiros - Saint of Legend 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 Seiros.

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Seiros Rating and Basic Information

FEH Seiros Banner

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

Seiros - Saint of Legend: Basic Information

Color / Weapon Type / Move Type
Rarity
What Kind of Character Are They? An Anima-type Mythic hero
・Scores guaranteed follow-up attacks in the player phase
・Grants massive buffs to other Mythic heroes on her team

Seiros Skills at 5★


Might: 16  Range: 1
Grants Atk +3. If unit initiates combat, grants Atk+6 to unit during combat and unit makes a guaranteed follow-up attack. If foe initiates combat, grants Def/Res +6 during combat and foe cannot make a follow-up attack. If foe's Range =2, calculates damage using the lower of foe's Def or Res.

Cooldown Count = 4
Boosts damage dealt by 80% of unit’s Res.

If unit initiates combat, grants Atk+6, Res+10 during combat and foe cannot make a follow-up attack.

If unit's Res > foe's Res, reduces damage from attacks during combat and from area-of-effect Specials (excluding Røkkr area-of-effect Specials) by percentage = difference between stats x 4 (max 40%).

Grants Atk/Spd/Def/Res+2+X to ally Mythic Heroes during combat in turns 1 through 5 (X = turn number). (Excludes unit.)
(Effect only active if team includes three or fewer Mythic Heroes, including unit.)

Seiros Best IVs

Recommended IVs

Stat Superboon/Superbane IV Recommendation
HP (18) HP Superbane ★★★☆☆
Atk (28) Attack Bane ★★★★☆
Spd (5) Spd Bane ★☆☆☆☆
Def (9) No Def IV ★★★★★
Res (12) No Res IV ★★★★★

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

+Res/-Spd

The best IVs for Seiros are +Res and -Spd. Seiros' kit revolves around the Res stat, and it is discussed in the Strengths and Weaknesses section. Glacies, Dragon Wall 3, her stat distribution and her overall playstyle relies on Res so it is no-brainer to take it. Her Spd is very low and is only less importance so it is safe to take as a bane. She relies on her skills to score follow-up attacks so do not worry about not landing follow-up attacks.

Be warned as Spd is a superbane, but it does not really matter as she does not rely on it at all.

+Res for a +10 Merge

This is for the same reason as above. The importance of her Res stat cannot be overlooked. With this IV, she reaches 47 Res at +10 Merges. At this point, it allows her to take lots of damage through damage calculation and through the effects of Dragon Wall 3. If you plan to replace Dragon Wall with another skill, you can go for a +Def or a +Atk IV instead.

Seiros Best Builds

Distant Counter SeirosHOT

Special Skill IconAether

See Explanation and Source Heroes

How to Use, Explanation

Distant Counter will be used in conjuction with Quick Riposte 3 so Seiros can double regardless of range. For Aether Raids Defense, she can take less damage with Distant Guard 3, though she can also make use of Joint Drive skills to buff her allies. However, you can just opt for her default Wings of Light if you have Mythic Heroes on your team.

Source Hero

Skill Hero
Seiros - Saint of Legend Icon Seiros - Saint of Legend (5★)
Seiros - Saint of Legend Icon Seiros - Saint of Legend (5★)

▶Other information regarding skills can be found here

Budget Seiros

Special Skill IconGlacies

See Explanation and Source Heroes

How to Use, Explanation

This build uses little skill inheritance. Since Seiros' skills are good already on their own, you can give her any Assist skill. Giving her Quick Riposte as a Sacred Skill will enable her to double when she is attacked.

Source Hero

Skill Hero
Seiros - Saint of Legend Icon Seiros - Saint of Legend (5★)
Seiros - Saint of Legend Icon Seiros - Saint of Legend (5★)
Seiros - Saint of Legend Icon Seiros - Saint of Legend (5★)
Seiros - Saint of Legend Icon Seiros - Saint of Legend (5★)
Seiros - Saint of Legend Icon Seiros - Saint of Legend (5★)

▶Other information regarding skills can be found here

Source Heroes for All Skills

Seiros Stats

Stat Rankings

Neutral Stats at Lv. 40 (5★)
Stat Total 177
177
HP
HP 40 40
Rank: 293/648
Atk
Atk 42 42
Rank: 5/648
Spd
Spd 18 18
Rank: 622/648
Def
Def 37 37
Rank: 45/648
Res
Res 40 40
Rank: 5/648

Stat Values

Lv 40+10 Stats (5★)

HP Atk Spd Def Res Total
+10 Merges W/ Skill Bonuses 45 66 22 41 45 219
Lv.40 +10 45 47 22 41 45 200

See Lv 40 +10 Stats With IVs
HP Atk Spd Def Res Total
+HP
Lv.40 +10
47 46 22 41 44 200
+Atk
Lv.40 +10
44 49 22 41 44 200
+Spd
Lv.40 +10
44 46 25 41 44 200
+Def
Lv.40 +10
44 46 22 44 44 200
+Res
Lv.40 +10
44 46 22 41 47 200

Stats at Lv 40

HP Atk Spd Def Res Total
5★- Adjusted for Skills 40 61 18 37 40 196
5★ Lv.40 40 42 18 37 40 177

Initial Stats (with Skills)

HP Atk Spd Def Res Total
5★ Lv.1 18 28 5 9 12 72

Stat Comparison of Similar Heroes

Hero
HP
Atk
Spd
Def
Res
Total
Seiros Icon Seiros
40 42 18 37 40 177
48 40 21 34 31 174

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

Seiros Roles, Strengths, and Weaknesses

Seiros Roles

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

Seiros is a close magic 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 Res stat. However, because of the effects of Aurora Breath, she will use the Def stat to calculate damage if it is lower than the foe's Res stat.

A Mythic Hero who can boost allies' HP and Atk

Effect Atk Icon
Atk+3
Spd Icon
Spd+4
Def Icon
Def+5
Res Icon Res+5
Light Icon Freyja - Lady of Nightmare Image Peony - Sweet Dream Image Mila - Goddess of Love Image Eir - Merciful Death Image Dagr - Sun
Astra Icon Altina - Dawn Reginn - Bearing Hope Image Plumeria - Lewd Dream Image Naga - Dragon Divinity Image
Dark Icon Bramimond - The Enigma Image Yune - Chaos Goddess Image Triandra - Nightmare Image Hel - Death Sovereign Image Sothis - Girl on the Throne Image
Anima Icon Duma - God of Strength Image Seiros - Saint of Legend Image Líf - Lethal Swordsman Image Thrasir - Omnicidal Witch Image Mirabilis - Daydream Image

Seiros is a Mythic Hero who will grant you an Anima Blessing when summoned. During Anima Season, Seiros' allies who also have a Anima Blessing will receive a HP+5 and Atk+3 to their stats, increasing the party's viability.

Seiros Strengths

Huge player phase bonuses

Seiros gets a lot of bonuses from her skills when initiating combat so she should initiate attacks whenever possible! The bonuses are as follows:

  1. +6 Atk and guaranteed follow-up attack from Aurora Breath
  2. +6 Atk, +10 Res and blocks enemy follow-up attacks from Mirror Impact

This is a total of +12 Atk, +10 Res, a guaranteed follow-up attack, and the ability to block enemy follow-ups.

Combined with Aurora Breath's adaptive damage where the lower defensive stat of a foe is used for damage calculations, Seiros gets a lot of power boosts, both offensive and defensive, simply by initiating attacks.

Seiros Player Phase Bonuses Fire Emblem Heroes FEH.png

Seiros' +12 Atk, +10 Res boost and the guaranteed follow-up attack reflects in this battle against a red mage.

Great defensive bonuses in both phases

In the player phase, Seiros takes advantage of Mirror Impact's +10 Res boost and follow-up block to help her survive encounters.

In the enemy phase, Aurora Breath provides +6 Def/Res and also provides a follow-up attack block. This means Seiros is able to block follow-up attacks in both phases.

In addition to these, her B skill, Dragon Wall, reduces the damage she takes from attacks and AoE specials depending on how much Res she has over her opponent. This damage reduction works on both phases so it helps with her bulk on all fronts!

Seiros Enemy Phase Bonuses Fire Emblem Heroes FEH.png

The calculated damage is at 6, but Seiros only takes 4 damage because of Dragon Wall

Heavily rewarded when stacking the Res stat

In addition to helping Dragon Wall reduce more damage, stacking Res will also allow Seiros to deal more damage through Glacies! This means Seiros' Res can be very valuable. Do your best to stack this helpful stat on Seiros.

Wings of Light provides buffs to Mythic allies

Wings of Light provides +1 Atk/Spd/Def/Res to all Mythic allies on turn 1, +2 Atk/Spd/Def/Res on turn 2 and so on up until turn 5. It can grant a huge power boost for your whole team especially at turns 4 and 5. If you can, work around the effects of this skill to easily take on the most powerful of enemies in the map!

This is very helpful in Aether Raids as it is not uncommon to run multiple Mythic heroes and battles are limited to 7 turns anyway.

Seiros Weaknesses

Wings of Light is somewhat situational

Wings of Light does provide massive boosts as discussed, but it only applies to allied Mythic heroes. It also only works in the first 5 turns, peaks at the 5th turn, then disappears completely.

Seiros is also unaffected by the bonuses so she needs allied Mythic heroes to shine most.

Weak to Dragon Effective Weapons and Specials

Seiros takes 1.5x damage from dragon-effective weapons like Falchion, Naga, or Ífingr. One blow from these types of weapons is sure to take her down if the opponent's enemy unit is well invested.

She is also weak to those running Ruptured Sky as their Special, as it deals 40% more damage to her due to her being a dragon.

Make sure you know what weapons you are up against before hopping too far into the line of battle!

Heroes with Effective Skills

Seiros Team and Counters

Teammates for Seiros

Legendary Eliwood Icon Legendary Eliwood Mirabilis Icon Mirabilis Masquerade Eldigan Icon Masquerade Eldigan Thrasir Icon Thrasir
New Year Peony Icon New Year Peony Legendary Leif Icon Legendary Leif Legendary Alm Icon Legendary Alm Brave Lyn Icon Brave Lyn

Mythic Heroes and Heroes with Dance/Sing Skills

Since Seiros will mostly be used in Aether Raids Defense to be able to slot in a 7th character, she will synergize well with fellow Anima mythics like Thrasir. Legendary Eliwood can also provide massive buffs through his weapon that grants the bonus doubler effect.

Ideally, she will be remaining on the backline, buffing her teammates, though she can still attack if need be, getting pretty far across the map the team has a dancer inherited with Ground Orders.

Seiros Counters

Halloween Tiki (Young) Icon Halloween Tiki (Young) Naga Icon Naga Brave Hector Icon Brave Hector Thrasir Icon Thrasir
Deirdre Icon Deirdre Legendary Edelgard Icon Legendary Edelgard Julia Icon Julia Brave Edelgard Icon Brave Edelgard

Heroes with Dragon-Effective Weapons or Specials

As a dragon, Seiros is weak to weapons that are effective against dragons.

Be mindful, as well, of units that have Ruptured Sky. They have the potential to one shot her because of the damage that Ruptured Sky can bring.

Hard-Hitting, Bulky, Armored Heroes

Specifically Brave Edelgard, Legendary Edelgard, and Brave Hector.

Brave Edelgard can reduce Seiros' damage by 80% if Seiros attacks her, as well as debuffing her with her weapon.

Legendary Edelgard can prevent Seiros from counterattacking due to her weapon and has a guaranteed follow up with her skill Raging Storm.

Brave Hector, meanwhile, has his own sheer bulk that Seiros will have to get through, not to mention his weapon refine that not only debuffs her, but also prevents her from making follow up attacks.

Hector himself can make him even bulkier with Ostian Counter.

Should you Unlock Potential?

Should You Unlock Potential for this Hero? Cannot Unlock Potential

Seiros - Saint of Legend Only Appears as a 5 Star Hero!

Seiros - Saint of Legend only appears as a 5 Star Hero. We will include whether or not you should Unlock Potential for Seiros - Saint of Legend if a 4 Star version is released!

Unlock Potential Tier List

Seiros - List of Skills

Weapons

Skill Name Might Range Effect Learned At
6 1 No Effect 5★
8 1 No Effect 5★
11 1 No Effect 5★
16 1 Grants Atk +3. If unit initiates combat, grants Atk+6 to unit during combat and unit makes a guaranteed follow-up attack. If foe initiates combat, grants Def/Res +6 during combat and foe cannot make a follow-up attack. If foe's Range =2, calculates damage using the lower of foe's Def or Res. 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★

Passives

Skill Name Effect Learned At
Grants Res +2 during combat when unit is attacked. 5★
Grants Atk/Res +2 during combat if unit initiates combat. 5★
Grants Atk/Res +4 during combat if unit initiates combat. 5★
If unit initiates combat, grants Atk+6, Res+10 during combat and foe cannot make a follow-up attack. 5★
If unit's Res > foe's Res, reduces damage from attacks during combat and from area-of-effect Specials (excluding Røkkr area-of-effect Specials) by percentage = difference between stats x 2 (max 20%). 5★
If unit's Res > foe's Res, reduces damage from attacks during combat and from area-of-effect Specials (excluding Røkkr area-of-effect Specials) by percentage = difference between stats x 3 (max 30%). 5★
If unit's Res > foe's Res, reduces damage from attacks during combat and from area-of-effect Specials (excluding Røkkr area-of-effect Specials) by percentage = difference between stats x 4 (max 40%). 5★
Grants Atk/Spd/Def/Res+2+X to ally Mythic Heroes during combat in turns 1 through 5 (X = turn number). (Excludes unit.)
(Effect only active if team includes three or fewer Mythic Heroes, including unit.)
5★

Seiros as a Source Hero

Seiros Avatar

Value of Skills ★★★★★

Inheriting Mirror Impact or Dragon Wall 3

Seiros can be used to inherit Mirror Impact or Dragon Wall 3. If you are able to inherit Mirror Strike 2 from another unit, you can get both skills from Seiros! However, Seiros is a powerful Mythic hero whom you can only get from specific banners. Please think carefully before fodderring her off as she will definitely help you a lot in Aether Raids.

How to Get Seiros / Illustrations / Voice Actor / Quotes

How to Get Seiros

Obtained through a Special Summoning Event!

Seiros is a limited time Hero who can be pulled from a Mythic Hero Summoning event. They do not appear in regular summons.

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

Voice Actor and Illustrator Information

Voice Actor
(English)
Cherami Leigh
Illustrator Nishiki Areku
Appears In

Illustration

Seiros.pngEnlarge Seiros.pngEnlarge Seiros.pngEnlarge Seiros.pngEnlarge

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Comment

1 Anonymous5 days

You're using the icon of "Swift sparrow" for "Mirror impact", you can clearly see the colour difference below "Passives" when comparing it to "Mirror Strike 1/2". Just wanted to point that out.

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    • What is a recommended hero merge level for endgame that we should target eg for edelguard? Is M+1 good enough?

    • >>[63]
      Thanks a lot Mike. Yes that’s duo/ninja Lyn. I’ll keep it then.

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