Blue
Lance
Flying
5 Star
Harsh Command+
B Duel Flying 4
Chill Atk/Spd 2
Atk/Def Rein 3
：
：
：
：
：
Silesse Frost
Rearmed Hinoka
Bridal Say'ri
Rearmed Ingrid
Chloé
Caeldori
Summer Shez (M)
Vanessa
Winter Cordelia
Legendary Caeda
Valentian Est
Farina
Young Tana
Díthorba
Tsubasa
Fiora
Hostile Springs Ryoma
Sumia
Spring Marisa
Bridal Tanith
Hinoka
Tana
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 / 
Resplendent
B Duel Flying 1
B Duel Flying 2
B Duel Flying 3
Chill Atk/Spd 1
Atk/Def Rein 1
Atk/Def Rein 2
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Fire Emblem Heroes (FEH)
Erinys Builds and Best IVs
★ Latest Banners - New Heroes: Harmonized CYL Ike, Lyn
☆ New Units - Harmonized Brave Ike, Harmonized Brave Lyn, Vanitas
☆ Free Units - N/A
This is a ranking page for the hero Erinys - Earnest Knight 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 Erinys.
List of Contents
| Legendary Heroes - Byleth: The Fódlan Star Featured Heroes | |||
|---|---|---|---|
 Líf[8.5/10] |
 Plumeria[9.0/10] |
 Azelle[9.0/10] |
 Legendary Julia[8.5/10] |
 Erinys[8.5/10] |
 Nótt[9.0/10] |
 Hel[8.5/10] |
 Dagr[9.0/10] |
 Legendary Byleth (M)[8.5/10] |
 Legendary Alm[9.0/10] |
 Legendary Leif[8.5/10] |
 Bramimond[8.5/10] |
Erinys Rating and Basic Information
| Overall Rating | 8.5/10 |
|---|---|
| Reroll Ranking (excluding Inherit Skill) |
B (▶Reroll Ranking) |
| Ranking (including Inherit Skill) |
B (▶FEH Tier List) |
Erinys - Earnest Knight: Basic Information
| Color / Weapon Type / Move Type | |
|---|---|
| Rarity | |
| What Kind of Character Are They? | ・Refined Silesse Frost has Canto, grants Atk/Spd+6, bonus Special charges per attack, and Dodge to Erinys and nearby allies, and grants Erinys bonus stats, true damage, true damage reduction, a Null Follow-Up effect, and a brave effect during combat. |
Erinys Skills at 5★
|
Might: 16 Range: 1 Grants Atk +3. At the start of combat if foe's HP ≥ 50%, grants Atk/Spd+6 to unit during combat, and also, if unit is within 2 spaces of support partner and initiates combat, unit attacks twice. |
|
Range: 1 Neutralizes target ally's penalties (from skills like Panic, Threaten, etc.) and negative status effects (preventing counterattacks, restricting movement, etc.) that last through ally's next action. Converts any penalties on target ally into bonuses. |
|
Grants HP+5, Atk/Spd/Def/Res+2. If unit is 5★, level 40, a Legendary or a Mythic Hero, and unit's stats total less than 175, treats unit's stats as 175 in modes like Arena. If unit is 5★, level 40, not a Legendary or a Mythic Hero, and unit's stats total less than 180, treats unit's stats as 180 in modes like Arena. (Higher-scoring opponents will appear. Stat total calculation excludes any values added by merges and skills.) |
|
At start of turn, inflicts Atk/Spd -5 on foe on the enemy team with the highest Atk+Spd total through its next action. |
|
Inflicts Atk/Def-4 on foes within 2 spaces during combat. |
Erinys Best IVs
Recommended IVs
| Stat | Superboon/Superbane | IV Recommendation |
|---|---|---|
| HP (17) |
|
★★★☆☆ |
| Atk (26) |
|
★★★★★ |
| Spd (11) |
|
★★★★☆ |
| Def (10) |
|
★★☆☆☆ |
| Res (6) |
|
★★☆☆☆ |
◯ = 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.
+Atk/-Def
The best IVs for Erinys are +Atk and -Def. Her weapon can guarantee her a double strike through a simple trigger condition, so even a small change in +Atk is very efficient in raising her overall damage. Taking a bane in her Def stat is ideal because it will balance her defensive stats. Taking a bane in Res will make her very susceptible to magic attacks so its not smart to take a bane in said stat.
Be warned that Def is a superbane, though! It will take -4 Def instead of the normal -3. If you can, get at least 1 merge on Erinys to eliminate any bane you have on her.
+Atk for a +10 Merge
We recommend a +Atk IV when merging Erinys to 10. With +10 merges, Erinys's Atk stat will reach 64 with the weapon skill. With her ability to double strike, and potential to consistently quad-attack, she can definitely be a high-ceiling unit when it comes to offenses.
Erinys Best Builds
Refined Erinys
| HOT | |
|---|---|
| Updated on 04/05/2025 | |
How to Use, Explanation
This build improves Erinys's offenses and allows her to deal as much damage as possible.
Budget Erinys
 ：
Moonbow
 ：
-
|
 ：
-
|
How to Use, Explanation
This is a budget build retaining most of Erinys's base kit while providing cheap options to improve performance.
Erinys Best Weapon Refine
Effect of Erinys's Refined Weapon
| Exclusive Weapon Effect from Refining (Special Effect Type) | |
|---|---|
| SP: 400 | |
| Might: 16 Range: 1 HP: 3 Grants Atk+3. Enables 【Canto (2)】. If unit initiates combat or foe's HP ≥ 50% at start of combat, grants Atk/Spd+6 and Def/Res+5 to unit, reduces damage from foe's first attack by 7 ("first attack" normally means only the first strike; for effects that grant "unit attacks twice," it means the first and second strikes), and neutralizes effects that guarantee foe's follow-up attacks and effects that prevent unit's follow-up attacks during combat, and also, if unit is within 4 spaces of a certain target ally, unit attacks twice during combat. (If support partner is on player team, targets any support partner; otherwise, targets ally with the highest Spd on player team, excluding unit.) At start of player phase or enemy phase, if unit is within 2 spaces of an ally, grants Atk/Spd+6, "Special cooldown charge +1 per attack during combat (only highest value applied; does not stack)," and【Dodge】to unit and allies within 2 spaces of unit for 1 turn. If unit is within 3 spaces of an ally, grants bonus to unit's Atk/Spd/Def/Res = 10% of unit's Spd at start of combat + 5 and deals damage = 20% of unit's Spd during combat (excluding area-of-effect Specials).  ：500  ：200 |
|
We recommend the Special Effect Refine for Silesse Frost
Refined Silesse Frost grants 【Canto (2)】 and grants Atk/Spd+6, Special cooldown charge +1 per attack
and【Dodge】 to Erinys and nearby allies at the start of player and enemy phases.
In combat, refined Silesse Frost grants Erinys Atk/Spd+6, Def/Res+5, an additional Atk/Spd/Def/Res bonus equal to 5 + 10% of her Spd, bonus true damage equal to 20% of her Spd, 7 true damage reduction on her foe's first attack, a Null Follow-Up effect, and a brave effect if she is within 4 spaces of either her support partner or the ally with the highest Spd.
This refine improves Erinys's offensive capabilities and provides decent support for herself and her allies.
Erinys Stats
Stat Rankings
| Neutral Stats at Lv. 40 (5★) | ||
|---|---|---|
| 172 | ||
| HP | 
39 |
Rank: 778/1322 |
| Atk | 
37 |
Rank: 584/1322 |
| Spd | 
41 |
Rank: 260/1322 |
| Def | 
32 |
Rank: 383/1322 |
| Res | 
23 |
Rank: 836/1322 |
Stat Values
Lv 40+10 Stats (5★)
| HP | Atk | Spd | Def | Res | Total | |
|---|---|---|---|---|---|---|
| +10 Merges W/ Skill Bonuses | 49 | 62 | 48 | 39 | 29 | 227 | Lv.40 +10 | 44 | 41 | 46 | 37 | 27 | 195 |
| HP | Atk | Spd | Def | Res | Total | |
|---|---|---|---|---|---|---|
| +HP Lv.40 +10 | 46 | 41 | 45 | 36 | 27 | 195 |
| +Atk Lv.40 +10 | 43 | 45 | 45 | 36 | 27 | 196 |
| +Spd Lv.40 +10 | 43 | 41 | 49 | 36 | 27 | 196 |
| +Def Lv.40 +10 | 43 | 41 | 45 | 39 | 27 | 195 |
| +Res Lv.40 +10 | 43 | 41 | 45 | 36 | 30 | 195 |
Stats at Lv 40
| HP | Atk | Spd | Def | Res | Total | |
|---|---|---|---|---|---|---|
| 5★- Adjusted for Skills | 44 | 58 | 43 | 34 | 25 | 204 |
| 5★ Lv.40 | 39 | 37 | 41 | 32 | 23 | 172 |
Initial Stats (with Skills)
| HP | Atk | Spd | Def | Res | Total | |
|---|---|---|---|---|---|---|
| 5★ Lv.1 | 17 | 26 | 11 | 10 | 6 | 70 |
Stat Comparison of Similar Heroes
| Hero |
HP |
Atk |
Spd |
Def |
Res |
Total |
|---|---|---|---|---|---|---|
| 40 | 48 | 48 | 36 | 28 | 200 | |
| 40 | 44 | 46 | 28 | 26 | 184 | |
| 38 | 44 | 47 | 30 | 25 | 184 | |
| 36 | 38 | 40 | 28 | 42 | 184 | |
| 39 | 40 | 44 | 30 | 31 | 184 | |
| 41 | 44 | 44 | 31 | 23 | 183 | |
| 39 | 40 | 43 | 27 | 34 | 183 | |
| 40 | 44 | 43 | 33 | 23 | 183 | |
| 39 | 38 | 43 | 27 | 31 | 178 | |
| 35 | 41 | 38 | 25 | 37 | 176 | |
| 39 | 36 | 38 | 30 | 30 | 173 | |
| 40 | 39 | 41 | 29 | 23 | 172 | |
| 43 | 35 | 38 | 23 | 33 | 172 | |
|
Erinys
|
39 | 37 | 41 | 32 | 23 | 172 |
| 39 | 32 | 40 | 26 | 30 | 167 | |
| 38 | 32 | 38 | 21 | 37 | 166 | |
| 40 | 35 | 36 | 28 | 23 | 162 | |
| 39 | 30 | 39 | 29 | 25 | 162 | |
| 42 | 33 | 38 | 28 | 21 | 162 | |
| 37 | 34 | 36 | 33 | 21 | 161 | |
| 41 | 35 | 32 | 25 | 24 | 157 | |
| 36 | 34 | 36 | 25 | 25 | 156 |
Note: Stats bonuses from skills are not taken into account.
Erinys Roles, Strengths, and Weaknesses
Erinys Roles
Erinys 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.
Erinys Strengths
Silesse Frost allows Erinys opportunities to score quad-attacks
Regular Silesse Frost is a simple weapon that grants Atk/Spd bonuses and a brave effect if Erinys is within 2 spaces of her support partner.
When refined, Silesse Frost grants 【Canto (2)】 and grants Atk/Spd+6, Special cooldown charge +1 per attack
and【Dodge】 to Erinys and nearby allies at the start of player and enemy phases.
In combat, refined Silesse Frost grants Erinys Atk/Spd+6, Def/Res+5, an additional Atk/Spd/Def/Res bonus equal to 5 + 10% of her Spd, bonus true damage equal to 20% of her Spd, 7 true damage reduction on her foe's first attack, a Null Follow-Up effect, and a brave effect if she is within 4 spaces of either her support partner or the ally with the highest Spd.
This refine improves Erinys's offensive capabilities and provides decent support for herself and her allies.
B Duel Flying 4 Raises your Arena score
B Duel Flying 4 is a special skill that treats the unit’s stats as 175 in the Arena, allowing your overall score to increase when using her. It is usable by any blue flying unit, so equip it and increase your score as you would like, but keep in mind that as an A slot skill it means you will lose the ability to useful, powerful A skills like Fury 4 or Atk/Spd Solo 4.
Because it is an upgrade from B Duel Flying 3, it also gives Atk/Spd/Def/Res +2 on top of the original +5 HP.
Erinys Weaknesses
Low Res
Erinys's Res only sits at 23 at Lv.40. This makes it easy for magic users to take her out. Be mindful of Erinys's positioning in relation to magical units that can easily take her out.
B Duel Flying 4 is mainly for scoring purposes
While B Duel Flying 4 does give some nice stats, the A skill can be home to very powerful skills that are cornerstones for great builds. If you plan to use Erinys outside of the Arena, make sure to get her an A skill that allows her to perform better in combat.
Weak to bows
As a flying unit, Erinys takes 1.5x damage from bows and weapons effective on flying units. Be sure to keep them out of the range of archers and leave them to other units.
Should you Unlock Potential?
| Should You Unlock Potential for this Hero? | Cannot Unlock Potential |
|---|
Erinys - Earnest Knight Only Appears as a 5 Star Hero!
Erinys - Earnest Knight only appears as a 5 Star Hero. We will include whether or not you should Unlock Potential for Erinys - Earnest Knight if a 4 Star version is released!
Erinys - 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. At the start of combat if foe's HP ≥ 50%, grants Atk/Spd+6 to unit during combat, and also, if unit is within 2 spaces of support partner and initiates combat, unit attacks twice. | 5★ |
Assists
| Skill Name | Range | Effect | Learned At |
|---|---|---|---|
| 1 | Converts penalties on target into bonuses. | 5★ | |
| 1 | Neutralizes target ally's penalties (from skills like Panic, Threaten, etc.) and negative status effects (preventing counterattacks, restricting movement, etc.) that last through ally's next action. Converts any penalties on target ally into bonuses. | 5★ |
Specials
| This Hero has no Special skills that can be learned. |
Passives
| Skill Name | Effect | Learned At |
|---|---|---|
| Grants HP+3. If unit is 5★ and level 40 and unit’s stats total less than 160, treats unit’s stats as 160 in modes like Arena. (Higher-scoring opponents will appear. Stat total calculation excludes any values added by merges and skills.) | 5★ | |
| Grants HP+4. If unit is 5★ and level 40 and unit’s stats total less than 165, treats unit’s stats as 165 in modes like Arena. (Higher-scoring opponents will appear. Stat total calculation excludes any values added by merges and skills.) | 5★ | |
| Grants HP+5. If unit is 5★ and level 40 and unit’s stats total less than 170, treats unit’s stats as 170 in modes like Arena. (Higher-scoring opponents will appear. Stat total calculation excludes any values added by merges and skills.) | 5★ | |
| Grants HP+5, Atk/Spd/Def/Res+2. If unit is 5★, level 40, a Legendary or a Mythic Hero, and unit's stats total less than 175, treats unit's stats as 175 in modes like Arena. If unit is 5★, level 40, not a Legendary or a Mythic Hero, and unit's stats total less than 180, treats unit's stats as 180 in modes like Arena. (Higher-scoring opponents will appear. Stat total calculation excludes any values added by merges and skills.) | 5★ | |
| At start of turn, inflicts Atk/Spd-3 on foe on the enemy team with the highest Atk+Spd total through its next action. | 5★ | |
| At start of turn, inflicts Atk/Spd -5 on foe on the enemy team with the highest Atk+Spd total through its next action. | 5★ | |
| Inflicts Atk/Def-2 on foes within 2 spaces during combat. | 5★ | |
| Inflicts Atk/Def-3 on foes within 2 spaces during combat. | 5★ | |
| Inflicts Atk/Def-4 on foes within 2 spaces during combat. | 5★ |
Erinys as a Source Hero
| Value of Skills | ★★★★★ |
|---|
Inheriting B Duel Flying 4 or Atk/Def Rein 3
Erinys can be used to inherit B Duel Flying 4 or Atk/Def Rein 3. If you are able to inherit B Duel Flying 3 from another unit, you can get both skills from Erinys! However, Erinys is a powerful hero whom you can provide some firepower for your flier teams. Please think carefully before fodderring her off!
How to Get Erinys / Illustrations / Voice Actor / Quotes
How to Get Erinys
Obtain Through Regular Summon
Erinys is a Hero who can be pulled from any summon.
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) |
G.K. Bowes |
|---|---|
| Illustrator | Kakage |
| Appears In |
Illustration
 |
 |
 |
 |
FEH: Related Guides
Legendary Heroes - Byleth: The Fódlan Star
| Heroes from Legendary Heroes - Byleth: The Fódlan Star | |||
|---|---|---|---|
| Líf [8.5/10] |
Plumeria [9.0/10] |
Azelle [9.0/10] |
Legendary Julia [8.5/10] |
| Erinys [8.5/10] |
Nótt [9.0/10] |
Hel [8.5/10] |
Dagr [9.0/10] |
| Legendary Byleth (M) [8.5/10] |
Legendary Alm [9.0/10] |
Legendary Leif [8.5/10] |
Bramimond [8.5/10] |
See All Blue Heroes
▶︎Return to the Blue Heroes Page
All Types of Blue Weapons
| Close-Range | Ranged |
|---|---|
 Lance |
 Blue Tome |
 Blue Breath |
 Blue Dagger |
 Blue Beast |
 Blue Bow |
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Erinys Builds and Best IVs
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