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).

Heroes With the Same Name
Byleth (F)	Byleth (M)
Summer Byleth (F)	Legendary Byleth (M)
Legendary Byleth (F)	Brave Byleth (F)
Sage Byleth (M)	Fallen Byleth (F)
Winter Byleth (M)

Mythic Heroes - Sothis Featured Heroes
Legendary Marth [9.0/10]	Byleth (M) [9.0/10]	Sothis [9.0/10]	Fjorm [8.5/10]
Legendary Azura [9.5/10]	Hostile Springs Ryoma [7.5/10]	Legendary Hector [9.0/10]	Legendary Lyn [8.5/10]
Valentine's Greil [8.0/10]	Eir [8.5/10]	Caineghis [9.0/10]	Legendary Alm [9.0/10]

Byleth (M) Rating and Basic Information

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	Red / Sword / Infantry
Rarity	5 Star
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★

Creator Sword 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.

Ruptured Sky 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%.

Distant Counter Enables unit to counterattack regardless of distance to attacker.

Chill Spd 3 At the start of each turn, inflicts Spd -7 on foe on the enemy team with the highest Spd through its next action.

Odd Spd Wave 3 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)		★★☆☆☆
Atk (28)		★★★★☆
Spd (8)		★★★★★
Def (8)		★★★☆☆
Res (3)		★★☆☆☆

◯ = 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
： Creator Sword ： Reposition ： Galeforce ： -	： Swift Sparrow 3 ： Special Spiral 3 ： Odd Spd Wave 3 ： Flashing Blade 3 ： -

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)

： Creator Sword ： Reposition ： Ruptured Sky ： -

： Distant Counter ： Chill Spd 3 ： Odd Spd Wave 3 ： Quickened Pulse ： -

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)

： Creator Sword ： Reposition ： Ruptured Sky ： -

： Distant Counter ： Null C-Disrupt 3 ： Joint Drive Atk ： Distant Def 3 ： -

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
： Creator Sword ： Reposition ： Ruptured Sky ： -	： Swift Sparrow 3 ： Windsweep 3 ： Cross Spur Atk ： Blade Session 3 ： -

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)
Creator Sword	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). ：500　：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	40	Rank: 489/1184
Atk	36	Rank: 666/1184
Spd	38	Rank: 399/1184
Def	34	Rank: 309/1184
Res	20	Rank: 1003/1184

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

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
Shez (M)	40	43	41	37	26	187
Holst	42	43	41	35	26	187
Young Mia	40	41	43	32	27	183
Young Ike	40	42	42	32	26	182
Guy	44	37	43	33	25	182
Brave Alm	42	38	35	37	20	172
Astram	44	35	36	36	21	172
Legendary Roy	39	34	38	32	26	169
Rutger	44	32	39	29	24	168
Byleth (M)	40	36	38	34	20	168
Brave Celica	38	33	39	29	24	163
Legendary Marth	40	34	36	32	21	163
Owain	41	32	37	31	22	163
Karla	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	Ranged-Physical	Close-Magic	Ranged-Magic
Physical Wall	Magic Wall	Effective Weapon	Movement Assist
Exclusive Skill	All-Range Counter	Recovery	Refresher
Legendary	Mythic	Duo / Harmonized	Resplendent

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
Iron Sword	6	1	No Effect	5★
Steel Sword	8	1	No Effect	5★
Silver Sword	11	1	No Effect	5★
Creator Sword	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
Dragon Gaze	(Cooldown Count = 4) Boosts Atk by 30%.	5★
Draconic Aura	(Cooldown Count = 3) Boosts Atk by 30%.	5★
Ruptured Sky	(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
Distant Counter	Enables unit to counterattack regardless of distance to attacker.	5★
Chill Spd 1	At the start of each turn, inflicts Spd -3 on foe on the enemy team with the highest Spd through its next action.	5★
Chill Spd 2	At the start of each turn, inflicts Spd -5 on foe on the enemy team with the highest Spd through its next action.	5★
Chill Spd 3	At the start of each turn, inflicts Spd -7 on foe on the enemy team with the highest Spd through its next action.	5★
Odd Spd Wave 1	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★
Odd Spd Wave 2	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★
Odd Spd Wave 3	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

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	Fire Emblem: Three Houses

Illustration

Quotes: Special Triggered

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

Lv 40 5★ Dialogue

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

FEH: Related Guides

Mythic Heroes - Sothis

Heroes from Mythic Heroes - Sothis
Legendary Marth [9.0/10]	Byleth (M) [9.0/10]	Sothis [9.0/10]	Fjorm [8.5/10]
Legendary Azura [9.5/10]	Hostile Springs Ryoma [7.5/10]	Legendary Hector [9.0/10]	Legendary Lyn [8.5/10]
Valentine's Greil [8.0/10]	Eir [8.5/10]	Caineghis [9.0/10]	Legendary Alm [9.0/10]

See All Red Heroes

▶︎Return to the Red Heroes Page

All Types of Red Weapons

Close-Range	Ranged
Sword	Red Tome
Red Breath	Red Dagger
Red Beast	Red Bow