Fire Emblem Heroes (FEH)

Byleth (M) Builds and Best IVs

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This is a ranking page for the hero Byleth - Tested Professor 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 Byleth (M).

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Byleth (M) Rating and Basic Information

FEH Byleth (M) Banner

Overall Rating 9.0/10
Reroll Ranking (excluding Inherit Skill) S
(▶Reroll Ranking)
Ranking (including Inherit Skill) S
(▶FEH Tier List)

Byleth - Tested Professor: Basic Information

Color / Weapon Type / Move Type
Rarity
What Kind of Character Are They? ・Exclusive weapon has the effects of Null Follow-Up
・Has a special that deals additional damage to dragons and beasts
・Can counterattack from any range

Byleth (M) Skills at 5★


Might: 16  Range: 1
Accelerates Special trigger (cooldown count-1). During combat, disables foe's skills that guarantee foe's follow-up attack or prevent unit's follow-up attack, and neutralizes skills that grant "Special cooldown charge +X" to foe or inflict "Special cooldown charge -X" on unit.

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%.

Enables unit to counterattack regardless of distance to attacker.

At the start of each turn, inflicts Spd -7 on foe on the enemy team with the highest Spd through its next action.

At start of odd-numbered turns, grants Spd +6 to unit and adjacent allies for 1 turn. (Bonus granted to unit even if no allies are adjacent. )

Byleth (M) Best IVs

Recommended IVs

Stat Superboon/Superbane IV Recommendation
HP (18) HP Superbane ★★☆☆☆
Atk (28) No Attack IV ★★★★☆
Spd (8) Spd Boon ★★★★★
Def (8) No Def IV ★★★☆☆
Res (3) No Res IV ★★☆☆☆

◯ = 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.

+Spd/-Res

M!Byleth's best IVs are + Spd and -Res. With his super boon in Spd, a Spd asset will give him a Spd stat of 42, meaning that follow-up attacks wil be practically guaranteed. His low Res stat is best used as a dump stat, so a Res bane is ideal.

Byleth (M) Best Builds

Galeforce Sprial Byleth (M)

HOT
Special Skill IconGaleforce
Emblem Icon: -
Attuned Skill Icon: -

How to Use, Explanation

This is a build based around inheriting Swift Sparrow and Special Spiral. Special Spiral and Flashing Blade have great synergy and will make. Galeforce very easy to trigger. Using Chill Spd 3 when Special Spiral is unavailable to you is plenty to get tons of mileage from this build.

Budget Byleth (M)

Emblem Icon: -
Attuned Skill Icon: -

How to Use, Explanation

This is a low investment build for Byleth (M). Since his default skills are already great, equipping him with an assist like Reposition and seal like Quickened Pulse is enough to make him ready for battle.

Null Disrupter Byleth (M)

Emblem Icon: -
Attuned Skill Icon: -

How to Use, Explanation

This build is based around inheriting Null C-Disrupt. This build will nullify the effects of skills like Dazzling Staff and Firesweep Bow that prevent a counterattack, allowing Byleth to counterattack any foe.

Windsweep Byleth (M)

HOT
Emblem Icon: -
Attuned Skill Icon: -

How to Use, Explanation

This is a offensive build for Byleth (M) using Windsweep 3 and increasing his firepower with Swift Sparrow 3 and Blade Session 3.

Source Heroes for All Skills

Byleth (M) Best Weapon Refine

Byleth (M)'s Refined Weapon

Exclusive Weapon Effect from Refining (Special Effect Type)
SP: 400
Might: 16 Range: 1 HP: 3
Accelerates Special trigger (cooldown count-1). During combat, neutralizes effects that guarantee foe's follow-up attacks, prevent unit's follow-up attacks, grant "Special cooldown charge +X" to foe, or inflict "Special cooldown charge -X" on unit. If unit initiates combat or is within 2 spaces of an ally, grants Atk/Spd/Def/Res+4 during combat.
At start of combat, if unit's HP ≥ 25%, grants Atk/Spd/Def/Res+4 to unit and reduces damage from foe's first attack by 30% during combat. If Special triggers, neutralizes "reduces damage by X%" effects from non-Special skills (excluding area-of-effect Specials).
Arena Medal:500 Divine Dew:200

We recommend the Special Effect Refine for Creator Sword

Creator Sword grants bonus stats, Special cooldown reduction, Tempo, and Null Follow-Up effect during combat.

It also grants damage reduction of 30% while neutralizing damage reduction skills when his Special skill triggers.

Byleth (M) Stats

Stat Rankings

Neutral Stats at Lv. 40 (5★)
168
HP
HP 40 40
Rank: 489/1171
Atk
Atk 36 36
Rank: 666/1171
Spd
Spd 38 38
Rank: 399/1171
Def
Def 34 34
Rank: 309/1171
Res
Res 20 20
Rank: 1003/1171

Stat Values

Lv 40+10 Stats (5★)

HP Atk Spd Def Res Total
+10 Merges W/ Skill Bonuses 45 57 43 38 24 207
Lv.40 +10 45 41 43 38 24 191

HP Atk Spd Def Res Total
+HP
Lv.40 +10
47 40 42 38 24 191
+Atk
Lv.40 +10
44 43 42 38 24 191
+Spd
Lv.40 +10
44 40 46 38 24 192
+Def
Lv.40 +10
44 40 42 41 24 191
+Res
Lv.40 +10
44 40 42 38 27 191

Stats at Lv 40

HP Atk Spd Def Res Total
5★- Adjusted for Skills 40 52 38 34 20 184
5★ Lv.40 40 36 38 34 20 168

Initial Stats (with Skills)

HP Atk Spd Def Res Total
5★ Lv.1 18 28 8 8 3 65

Stat Comparison of Similar Heroes

Hero
HP
Atk
Spd
Def
Res
Total
40 43 41 37 26 187
42 43 41 35 26 187
40 41 43 32 27 183
40 42 42 32 26 182
44 37 43 33 25 182
42 38 35 37 20 172
44 35 36 36 21 172
39 34 38 32 26 169
44 32 39 29 24 168
Byleth (M) Icon Byleth (M)
40 36 38 34 20 168
38 33 39 29 24 163
40 34 36 32 21 163
41 32 37 31 22 163
42 35 40 23 22 162

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

Byleth (M) Roles, Strengths, and Weaknesses

Byleth (M) Roles

Byleth - Tested Professor Roles
Close Physical Attack ImageClose-Physical Ranged Physical AttackRanged-Physical Close Magic AttackClose-Magic Ranged MagicRanged-Magic
Physical Wall ImagePhysical Wall Magic WallMagic 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

M!Byleth is a close ranged 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.

Byleth (M)'s Strengths

Exclusive weapon has Null Follow-Up built into it

M!Byleth's exclusive weapon skill, Creator Sword, has the effect of Null Follow-Up. This will allow him to reduce the damage taken from foes with skills like Bold Fighter and Quick Riposte, and will also allow him to make a follow-up attack even against foes with the skill Wary Fighter.

Can neutralize skills that change special cooldown

Creator Sword will also prevent any enemy skill from slowing down or speeding up a special's cooldown or speeding up. This means that he can nullify Flashing Blade or Heavy Blade and use his special without being affected by Special Fighter or Guard.

Low cooldown special that is effective on dragons and beasts

Byleth's special skill Ruptured Sky will boost damage by 40% of a foe's Atk if they are a dragon or beast. When his HP drops to 75%, Byleth will be able to use the effects of Wrath and Ruptured Sky together to get a guaranteed special, which allows him to deal heavy damage to characters like Tibarn or Duma.

Can counterattack from any range

M!Byleth has the ever-useful A slot skill Distant Counter, which allows him to counterattack any foe, regardless of their range. As long as the foe does not have skills to prevent a counterattack like Dazzling Staff, he should be able to return fire to any foe.

Byleth (M)'s Weaknesses

Low Res stat

Byleth has a base Res stat of a mere 20, so even with Distant Counter, it is easy for him to fall to a magic attack before haveing a chance to retaliate. Use a combination of Sacred Seals and support units to prevent this.

Should you Unlock Potential?

Should You Unlock Potential for this Hero? Cannot Unlock Potential

Byleth - Tested Professor Only Appears as a 5 Star Hero!

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

Unlock Potential Tier List

Byleth (M) - 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 Accelerates Special trigger (cooldown count-1). During combat, disables foe's skills that guarantee foe's follow-up attack or prevent unit's follow-up attack, and neutralizes skills 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 Atk by 30%. 5★
(Cooldown Count = 3) Boosts Atk by 30%. 5★
(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★

Passives

Skill Name Effect Learned At
Enables unit to counterattack regardless of distance to attacker. 5★
At the start of each turn, inflicts Spd -3 on foe on the enemy team with the highest Spd through its next action. 5★
At the start of each turn, inflicts Spd -5 on foe on the enemy team with the highest Spd through its next action. 5★
At the start of each turn, inflicts Spd -7 on foe on the enemy team with the highest Spd through its next action. 5★
At start of odd-numbered turns, grants Spd +2 to unit and adjacent allies for 1 turn. (Bonus granted to unit even if no allies are adjacent. ) 5★
At start of odd-numbered turns, grants Spd +4 to unit and adjacent allies for 1 turn. (Bonus granted to unit even if no allies are adjacent. ) 5★
At start of odd-numbered turns, grants Spd +6 to unit and adjacent allies for 1 turn. (Bonus granted to unit even if no allies are adjacent. ) 5★

Byleth (M) as a Source Hero

Byleth (M) Avatar

Value of Skills ★★★★★

Inheriting Ruptured Sky or Fury 4

You may want to use F!Byleth to inherit Ruptured Sky or Fury 4. However, as Byleth is a very useful hero, we recommend you keep at least one before foddering off a duplicate.

▶Source Heroes for Skills
▶Source Heroes Tier List

How to Get Byleth (M) / Illustrations / Voice Actor / Quotes

How to Get Byleth (M)

Obtain Through Regular Summon

Byleth (M) 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)
Zach Aguilar
Illustrator 悌太
Appears In

Illustration

Quotes: Special Triggered

Special Triggered Quotes are voice lines that play upon activating a Special attack.

Allow me to demonstrate.
Let the lesson begin.
No hesitation.
It's over.

Lv 40 5★ Dialogue

Lv 40 5★ Dialogue become available when a hero attains Lv. 40 at 5★ rarity.

How long has it been since I was summoned to this world to fight alongside you?
The flow of time brought us together, and now we are bound inextricably. I am your ally, and you are mine.
I have not forgotten the needs of my students. But I have no regrets about my decision to join your cause.
The Sword of the Creator empowers me to sever my doubts—to carve a path through tangles of uncertainty.
With this sword in hand, I will defeat our foes and lead us to victory.

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Comment

5 Twztid13 9 months

4 comments, but shows 0... 🤦🏼‍♂️ If u are going to copy/paste, at least change the references to "F!Byleth" & the wrath skill, which this character doesn't have. 🤦🏼‍♂️🤦🏼‍♂️ I'm beginning to see why so many people tell me not to use this site because it seems lazy & is full of outdated or incorrect information...

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