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Byleth: Proven Professor
Byleth: Tested Professor
Byleth: Fell Star's Duo
Byleth: The Fódlan Star
Byleth: The Fódlan Light
Sothis: Girl on the Throne
Sothis: Silver Specter
General Quotes Misc Heroic Ordeal
Sothis
Bound-Spirit Duo
Portrait
Sothis Bound-Spirit Duo Face.webp
Attack
Sothis Bound-Spirit Duo BtlFace.webp
Special
Sothis Bound-Spirit Duo BtlFace C.webp
Damage
Sothis Bound-Spirit Duo BtlFace D.webp
Art by: azu-taro (azuタロウ)
Description A mysterious girl who appeared to Byleth only in dreams now joins him in reality for the harvest festival. They appear in Fire Emblem: Three Houses.
Rarities 5★Special
Duo Skill Grants【Null Follow-Up】to unit and allies within 2 spaces. If unit or any ally within 2 spaces has their Special cooldown count at its maximum value, grants them Special cooldown count-1.

Once used, Duo Skill cannot be activated again right away. At start of odd-numbered turns, if Duo Skill has already been used, unit can use Duo Skill again.

【Null Follow-Up】
If unit's Spd > foe's Spd during combat, neutralizes effects that guarantee foe's follow-up attacks and effects that prevent unit's follow-up attacks for 1 turn.

(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 195, treats unit's stats as 195 in modes like Arena. (Higher-scoring opponents will appear. Stat total calculation excludes any values added by merges and skills.)
Weapon Type  Blue Breath
Move Type  Flying
Voice Actor EN Cassandra Lee Morris + Zach Aguilar
Voice Actor JP Kurosawa Tomoyo (黒沢ともよ) with Kobayashi Yuusuke (小林裕介)
Release Date
Addition Date
Entry Icon MiniUnit Head 12.png Three Houses
Internal ID PID_比翼ソティス (713)
Origin 120000100300

Stats

All stats have a degree of variation. The stat growth page explains how the variation works.

Level 1 stats

RarityHPAtkSpdDefResTotal
1★15/16/173/4/56/7/84/5/61/2/334
2★15/16/173/4/57/8/95/6/71/2/336
3★16/17/184/5/67/8/95/6/72/3/439
4★16/17/184/5/68/9/106/7/82/3/441
5★17/18/195/6/78/9/106/7/83/4/544

Level 40 stats

RarityHPAtkSpdDefResTotal
1★29/32/3524/27/2929/31/3420/23/2522/25/27137~139
2★30/33/3626/29/3132/34/3722/25/2824/27/29147~149
3★33/36/3929/32/3534/37/4024/27/3027/30/33162
4★34/37/4030/33/3736/40/4326/29/3228/31/35169~171
5★36/40/4333/36/4038/42/4528/31/3431/34/38182~184

Growth Rates

This set of values, after being multiplied by a rarity factor, determines how much each stat will increase from level 1 to level 40, see stat growth.

RarityHPAtkSpdDefResTotal
3★50%70%75%55%70%320%

Stats between level 1 and 40

For stat values between level 1 and 40, see this page.

Skills[]

Weapons[]

NameMightRangeDescriptionSPDefaultUnlock
Fire Breath61501★1★
Fire Breath+811002★2★
Flametongue1112004★3★
Eerie Scripture161
Accelerates Special trigger (cooldown count-1). Neutralizes "effective against dragons" bonuses. Unit can counterattack regardless of foe's range. If foe initiates combat or if foe's HP ≥ 75% at start of combat, grants Atk/Spd/Def/Res+5 to unit during combat. If foe's Range = 2, calculates damage using the lower of foe's Def or Res.
4005★5★

Assists[]

This unit owns no Assist skills.

Specials[]

NameCooldownDescriptionSPDefaultUnlock
Daylight3
Restores HP = 30% of damage dealt.
1004★3★
Noontime2
Restores HP = 30% of damage dealt.
2004★
Sirius2
Boosts damage by 30% of unit's Spd. Restores HP = 30% of damage dealt.
5005★

Passives[]

TypeNameDescriptionSPUnlock
AAtk/Spd Solo 1
If unit is not adjacent to an ally, grants Atk/Spd+2 during combat.
602★
Atk/Spd Solo 2
If unit is not adjacent to an ally, grants Atk/Spd+4 during combat.
1203★
Atk/Spd Solo 3
If unit is not adjacent to an ally, grants Atk/Spd+6 during combat.
2404★
Atk/Spd Solo 4
If unit is not adjacent to an ally, grants Atk/Spd+7 during combat.
3005★
BDragon's Wrath 1
If foe initiates combat, reduces damage from foe's first attack by 10% during combat, and also, if unit's Atk > foe's Res, unit's first attack deals damage = 10% of unit's Atk minus foe's Res during combat.
603★
Dragon's Wrath 2
If foe initiates combat, reduces damage from foe's first attack by 15% during combat, and also, if unit's Atk > foe's Res, unit's first attack deals damage = 15% of unit's Atk minus foe's Res during combat.
1204★
Dragon's Wrath 3
If foe initiates combat, reduces damage from foe's first attack by 20% during combat, and also, if unit's Atk > foe's Res, unit's first attack deals damage = 20% of unit's Atk minus foe's Res during combat.
2405★
CAtk/Spd Rein 1
Inflicts Atk/Spd-2 on foes within 2 spaces during combat.
601★
Atk/Spd Rein 2
Inflicts Atk/Spd-3 on foes within 2 spaces during combat.
1202★
Atk/Spd Rein 3
Inflicts Atk/Spd-4 on foes within 2 spaces during combat.
2404★

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