Summer Byleth (F) Builds and Best IVs | Fire Emblem Heroes (FEH)

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Special Heroes - Overseas Memories Featured Heroes
Summer Byleth (F) Icon Summer Byleth (F)
[9.5/10]
Summer Ingrid Icon Summer Ingrid
[9.0/10]
Summer Sylvain Icon Summer Sylvain
[8.0/10]
Summer Dorothea Icon Summer Dorothea
[8.0/10]

Summer Byleth (F) Rating and Basic Information

FEH Summer Byleth (F) Banner

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

Byleth - Fell Star's Duo: Basic Information

Color / Weapon Type / Move Type
Rarity
What Kind of Character Are They? Has a unique Duo Skill
・Weapon prevents enemy skills that guarantee follow-up and neutralizes skills that prevent unit from making follow-ups
・Powerful buffs to Atk and Spd

Summer Byleth (F) Skills at 5★

Skill Name Might Range Effect
14 2 Accelerates Special trigger (cooldown count -1). At start of combat, if unit’s Spd > foe’s Spd or if foe’s HP = 100%, grants Atk/Spd +5 to unit during combat and neutralizes effects that guarantee foe’s follow-up attacks and effects that prevent unit’s follow-up attacks.
-
Cooldown = 2
Boosts damage by 20% of foe's Atk. If in combat against a dragon foe or beast foe, boosts damage by 40% instead of 20%.
-
At start of combat, if unit's HP ≥ 25%, grants Atk/Spd+7, but after combat, if unit attacked, deals 5 damage to unit.
-
At start of turn, inflicts Spd/Res-5 on foe on the enemy team with the highest Spd+Res total through its next action.
-
At start of turn, grants the following status effect to adjacent infantry, armored, and cavalry allies for 1 turn: "Unit can move to a space adjacent to any ally within 2 spaces."

Summer Byleth (F)'s Duo Skill Effect

Duo Skill
Grants【Desperation】to unit and allies within 2 spaces.
At start of every third turn, if Duo skill has already been used, unit can use Duo Skill again.
【Desperation】
Grants the following effect for 1 turn: “If unit initiates combat, unit can make a follow-up attack before foe can counterattack.”
(Duo Skills can be used once per map by tapping the Duo button. Duo Skills cannot be used by units deployed using Pair Up.)

Standard Effect 1

Duel
If unit is 5★ and level 40 and unit's stats total less than 185, treats unit's stats as 185 in modes like Arena. (Higher-scoring opponents will appear. Stat total calculation excludes any values added by merges and skills.)

Summer Byleth (F) Best IVs and Stats at Lv. 40

Stats

Lv 40+10 Stats (5★)

HP Atk Spd Def Res Total
+10 Merges W/ Skill Bonuses 45 55 47 20 25 192
Lv.40 +10 45 41 47 20 25 178

See Lv 40 +10 Stats With IVs
HP Atk Spd Def Res Total
+HP
Lv.40 +10
47 40 46 20 25 178
+Atk
Lv.40 +10
44 43 46 20 25 178
+Spd
Lv.40 +10
44 40 50 20 25 179
+Def
Lv.40 +10
44 40 46 23 25 178
+Res
Lv.40 +10
44 40 46 20 28 178

Stats at Lv 40

HP Atk Spd Def Res Total
5★- Adjusted for Skills 40 50 42 16 21 169
5★ Lv.40 40 36 42 16 21 155

Initial Stats (with Skills)

HP Atk Spd Def Res Total
5★ Lv.1 18 22 12 3 4 59

Recommended IVs

Stat Superboon/Superbane IV Recommendation
HP (18) HP Superbane ★★★☆☆
Atk (22) No Attack IV ★★★★☆
Spd (12) Spd Boon ★★★★★
Def (3) Def Bane ★★★☆☆
Res (4) No Res IV ★★☆☆☆

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

+Spd/-Res

The best IVs for Summer Byleth are +Spd and -Res. A higher Spd stat allows Byleth to get a ton of follow-up attacks on her foes. Additionally, her Spd is a superboon so you should take advantage of that as much as possible. Another reason why you should take a Spd boon is that her weapon effect relies on her having a high Spd stat. Her Res is of less importance as she is mainly an offensive unit so it is safe to take as a bane.

+Atk for a +10 Merge

We recommend a +Atk IV when merging Summer Byleth to 10. At +10 Merges, Byleth's Spd will reach such high levels that pushing it up higher is a waste. At this point, it would be better to opt with a +Atk IV instead to help her deal more damage with the follow-up attacks she scores.

Stat Comparison of Similar Heroes

Hero
HP
Atk
Spd
Def
Res
Total
Summer Byleth (F) Icon Summer Byleth (F)
40 36 42 16 21 155
40 38 38 33 18 167
40 36 41 23 26 166
38 33 38 22 20 151
41 26 33 25 22 147

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

Summer Byleth (F) Best Builds

Windsweep Summer Byleth (F)HOT

+
Spd
-
Res

Budget Summer Byleth (F)

Source Heroes for All Skills

Summer Byleth (F) Best Weapon Refine

Summer Byleth (F)'s Weapon Cannot Be Refined!

Summer Byleth (F)'s weapon cannot currently be refined. This section will be updated if it becomes refineable in the future!

About the Weapon Refinery

Summer Byleth (F) Roles, Strengths, and Weaknesses

Summer Byleth (F) Roles

Byleth - Fell Star's Duo Roles
Close Physical AttackClose-Physical Ranged Physical AttackRanged-Physical Close Magic AttackClose-Magic Ranged Magic ImageRanged-Magic
Physical Wall ImagePhysical Wall Magic WallMagic 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 No Mythic Hero ImageMythic Duo and Harmonized ImageDuo/Harmonized No Resplendent ImageResplendent

Summer Byleth (F) is a ranged magic attacker (range = 2). Therefore, when not accounting for the Weapon Triangle, the amount of damage he/she deals will be equivalent to his/her Atk minus the foe's Res stat.

Duo Skill Usable in Arena

Summer Byleth (F)'s Duo Skill raises her arena score, in addition to unleashing a powerful battle effect. Duo Heroes have a Duo Skill which can be used once per map. Additionally, her Duel effect treats her stats as 185 in Arena modes, giving her a huge advantage over many other heroes.

The effect of Byleth's Duo Skill is shown below

Summer Byleth Duo Skill.jpg

Her duo skill grants her and all allies wihin 2 spaces of her Desperation. It is pretty similar Desperation 3 as it allows for the follow-up attack to come before the foe's counterattack, but this status does not require for an HP requirement.

You can read the in-game text for Summer Byleth (F)'s duo skill and the duel component in this section!

Summer Byleth (F) Strengths

Access to a Duo Skill

As discussed above, Summer Byleth (F) has access to a duo skill that grants her and her allies the effects of Desperation without a HP requirement. After the first use, you can use it again at the start of every third turn. It has lots of strategic value especially when timed right as it can potentially allow your units to take out priority targets without taking damage.

A Slot Skill gives massive bonus to Atk/Spd

Summer Byleth (F) has the A slot skill Atk/Spd Push 4, which grants Atk/Spd+7 so long as her HP is at or above 25%. It will inflict damage on Summer Byleth (F) after battle, but considering a higher Spd allows Sun's Percussors to disable guaranteed follow-up attacks, this large buff is worth it.

Sun's Percussors

Sun's Percussors does a Spd check at the start of combat and if Byleth's Spd is greater than the foe's, it grants the following effects:

  1. Grants +5 Atk/Spd to Byleth. This means Byleth is guaranteed a follow-up attack as long as she has 1 Spd more than her foe.
  2. Neutralizes effects that guarantee foe's follow-up attacks like Vengeful Fighter 3
  3. Neutralizes effects that prevent Byleth from scoring follow-up attacks like Wary Fighter 3

These effects also kicks-in regardless of Byleth's Spd if the foe is at 100% HP.

Additionally, Sun's Percussors also accelerates Byleth's special trigger by 1 count.

Summer Byleth (F) Weaknesses

Weak to bows

As a flying unit, Summer Byleth (F) 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.
Heroes with Effective Skills

Should you Unlock Potential for Summer Byleth (F)?

Should You Unlock Potential for this Hero? Cannot Unlock Potential

Byleth - Fell Star's Duo Only Appears as a 5 Star Hero!

Byleth - Fell Star's Duo only appears as a 5 Star Hero. We will include whether or not you should Unlock Potential for Byleth - Fell Star's Duo if a 4 Star version is released!

Unlock Potential Tier List

Summer Byleth (F) - List of Skills

Weapons

Skill Name Might Range Effect Learned At
4 2 No Effect 5★
6 2 No Effect 5★
14 2 Accelerates Special trigger (cooldown count -1). At start of combat, if unit’s Spd > foe’s Spd or if foe’s HP = 100%, grants Atk/Spd +5 to unit during combat and neutralizes effects that guarantee foe’s follow-up attacks and effects that prevent unit’s follow-up attacks. 5★

Assists

This Hero has no Assist skills that can be learned.

Specials

Skill Name Effect Learned At
(Cooldown Count = 2) Boosts damage by 20% of foe's Atk. If in combat against a dragon foe or beast foe, boosts damage by 40% instead of 20%. 5★
(Cooldown Count = 4) Boosts Atk by 30%. 5★
(Cooldown Count = 3) Boosts Atk by 30%. 5★

Passives

Skill Name Effect Learned At
At start of combat, if unit’s HP = 100%, grants Atk/Spd +3, but if unit attacked, deals 1 damage to unit after combat. 5★
At start of combat, if unit’s HP = 100%, grants Atk/Spd +4, but if unit attacked, deals 1 damage to unit after combat. 5★
At start of combat, if unit’s HP = 100%, grants Atk/Spd +5, but if unit attacked, deals 1 damage to unit after combat. 5★
At start of combat, if unit's HP ≥ 25%, grants Atk/Spd+7, but after combat, if unit attacked, deals 5 damage to unit. 5★
At start of turn, inflicts Spd/Res-5 on foe on the enemy team with the highest Spd+Res total through its next action. 5★
At start of turn, inflicts Spd/Res-3 on foe on the enemy team with the highest Spd+Res total through its next action. 5★
At the start of each turn, inflicts Res -3 on foe on the enemy team with the highest Res through its next action. 5★
At start of turn, if unit's HP = 100%, grants the following status to adjacent infantry, armored, and cavalry allies for 1 turn: "Unit can move to a space adjacent to any ally within 2 spaces." 5★
At start of turn, if unit's HP ≥ 50%, grants the following status to adjacent infantry, armored, and cavalry allies for 1 turn: "Unit can move to a space adjacent to any ally within 2 spaces." 5★
At start of turn, grants the following status effect to adjacent infantry, armored, and cavalry allies for 1 turn: "Unit can move to a space adjacent to any ally within 2 spaces." 5★

Summer Byleth (F) as a Source Hero

Summer Byleth (F) Avatar

Value of Skills ★★★★★

Inheriting Ruptured Sky or Atk/Spd Push 4

Summer Byleth (F) can be used to inherit Ruptured Sky or Atk/Spd Push 4. If you are able to inherit Atk Spd Push 3 from another unit, you can get both skills from Summer Byleth (F)! However, Summer Byleth (F) is a powerful special hero whom you can only get from specific banners. Please think carefully before fodderring her off!

How to Get Summer Byleth (F) / Illustrations / Voice Actor / Quotes

How to Get Summer Byleth (F)

Obtained through a Special Summoning Event!

Summer Byleth (F) 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)
Jeannine Tirado with Cherami Leigh
Illustrator cuboon
Appears In

FEH: Related Links

Special Heroes: Overseas Memories

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Heroes from Special Heroes - Overseas Memories
Summer Byleth (F) Icon Summer Byleth (F)
[9.5/10]
Summer Ingrid Icon Summer Ingrid
[9.0/10]
Summer Sylvain Icon Summer Sylvain
[8.0/10]
Summer Dorothea Icon Summer Dorothea
[8.0/10]

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Comment

1 cuboon5 months

I am a fan of cuboon's work. god bless this man. This duo is a close 2nd to Igrene (+10 +Atk btw) #cuboon

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