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Byleth: Proven Professor
Byleth: Tested Professor
Byleth: Fell Star's Duo
Byleth: The Fódlan Star
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★ Focus — 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 Icon Move Flying.png 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 Scripture161Accelerates 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
Daylight3Restores HP = 30% of damage dealt.1004★3★
Noontime2Restores HP = 30% of damage dealt.2004★
Sirius2Boosts damage by 30% of unit's Spd. Restores HP = 30% of damage dealt.5005★

Passives[]

TypeNameDescriptionSPUnlock
AAtk/Spd Solo 1If unit is not adjacent to an ally, grants Atk/Spd+2 during combat.602★
Atk/Spd Solo 2If unit is not adjacent to an ally, grants Atk/Spd+4 during combat.1203★
Atk/Spd Solo 3If unit is not adjacent to an ally, grants Atk/Spd+6 during combat.2404★
Atk/Spd Solo 4If unit is not adjacent to an ally, grants Atk/Spd+7 during combat.3005★
BDragon's Wrath 1If 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 2If 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 3If 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 1Inflicts Atk/Spd-2 on foes within 2 spaces during combat.601★
Atk/Spd Rein 2Inflicts Atk/Spd-3 on foes within 2 spaces during combat.1202★
Atk/Spd Rein 3Inflicts Atk/Spd-4 on foes within 2 spaces during combat.2404★

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