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| General | Quotes | Misc | Heroic Ordeal |
| Byleth Fell Star's Duo | ||
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| Description | Byleth, a professor at the Church of Seiros's Officers Academy, and Rhea, the church's archbishop, enjoying a summer away. They appear in Fire Emblem: Three Houses. | |
| Rarities | 4  SR — Special  Duo
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| Duo Skill [Collapse] |
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. (Duo Skills can be used by tapping the Duo button. Duo Skills cannot be used by units deployed using Pair Up.) |
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 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.) | |
| Weapon Type |  Red Tome
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| Move Type |  Flying
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| Voice Actor EN | Jeannie Tirado + Cherami Leigh | |
| Voice Actor JP | 伊藤静(Shizuka Itoh) with 井上喜久子(Kikuko Inoue) | |
| Release Date | ||
| Addition Date | ||
| Entry |  Three Houses
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| Version | 4.7 | |
| Internal ID | PID_比翼ベレス (538)
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| Origin | 120000100200 | |
Stats
Level 1 stats
| Rarity | HP | Atk | Spd | Def | Res | Total |
|---|---|---|---|---|---|---|
1  | 15/16/17 | 5/6/7 | 9/10/11 | 0/1/2 | 1/2/3 | 35 |
2  | 15/16/17 | 6/7/8 | 10/11/12 | 0/1/2 | 1/2/3 | 37 |
3  | 16/17/18 | 6/7/8 | 10/11/12 | 1/2/3 | 2/3/4 | 40 |
4  | 16/17/18 | 7/8/9 | 11/12/13 | 1/2/3 | 2/3/4 | 42 |
5  | 17/18/19 | 7/8/9 | 11/12/13 | 2/3/4 | 3/4/5 | 45 |
Level 40 stats
| Rarity | HP | Atk | Spd | Def | Res | Total |
|---|---|---|---|---|---|---|
| 1 | 29/32/35 | 24/27/30 | 30/33/35 | 8/10/13 | 12/15/17 | 116~118 |
| 2 | 30/33/36 | 27/30/33 | 33/36/38 | 8/11/14 | 13/16/18 | 125~126 |
| 3 | 33/36/39 | 29/32/35 | 35/38/41 | 10/13/16 | 15/18/21 | 137 |
| 4 | 34/37/40 | 31/34/37 | 37/40/44 | 11/14/17 | 16/19/22 | 144~145 |
| 5 | 36/40/43 | 33/36/39 | 39/42/46 | 12/16/19 | 18/21/24 | 154~156 |
Growth Rates
| Rarity | HP | Atk | Spd | Def | Res | Total |
|---|---|---|---|---|---|---|
| 3 | 50% | 65% | 70% | 30% | 40% | 255% |
Stats between level 1 and 40
Skills[ | ]
Weapons[ | ]
| Name | Might | Range | Description | SP | Default | Unlock |
|---|---|---|---|---|---|---|
| Fire | 4 | 2 | — | 50 | 1 | 1 |
| Elfire | 6 | 2 | — | 100 | 2 | 2 |
| Bolganone | 9 | 2 | — | 200 | 4 | 3 |
| Sun's Percussors | 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. | 400 | 5 | 5 |
Sun's Percussors can be upgraded in the Weapon Refinery.
When upgraded, the description of Sun's Percussors becomes "Accelerates Special trigger (cooldown count-1).
At start of combat, if unit's Spd ≥ foe's Spd-5 or if foe's HP ≥ 75%, grants Atk/Spd+5 and Def/Res+4 to unit, neutralizes effects that guarantee foe's follow-up attacks and effects that prevent unit's follow-up attacks, neutralizes effects that inflict "Special cooldown charge -X" on unit, and reduces the percentage of foe's non-Special "reduce damage by X%" skills by 50% during combat (excluding area-of-effect Specials).
Grants Atk/Spd+4 and "reduces the percentage of foe's non-Special 'reduce damage by X%' skills by 50% (excluding area-of-effect Specials)" to allies within 2 spaces of unit during their combat.".
Sun's Percussors can be upgraded with the additional effect 
"If unit initiates combat or is within 3 spaces of an ally, grants bonus to unit's Atk/Spd/Def/Res = number of allies within 3 spaces of unit × 2, + 4 (max 10) and deals damage = 15% of unit's Spd during combat (excluding area-of-effect Specials).
If unit initiates combat, reduces damage from foe's first attack by 50% during combat ("first attack" normally means only the first strike; for effects that grant "unit attacks twice," it means the first and second strikes), and also, if foe's attack can trigger foe's Special, inflicts Special cooldown count+1 on foe before foe's first attack (cannot exceed the foe's maximum Special cooldown).".
Assists[ | ]
Specials[ | ]
| Name | Cooldown | Description | SP | Default | Unlock |
|---|---|---|---|---|---|
| Dragon Gaze | 4 | Boosts damage by 30% of unit's Atk. | 100 | 4 | 3 |
| Draconic Aura | 3 | Boosts damage by 30% of unit's Atk. | 200 | — | 4 |
| Ruptured Sky | 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%. | 500 | — | 5 |
Passives[ | ]
| Type | Name | Description | SP | Unlock | |
|---|---|---|---|---|---|
| A |  | Atk/Spd Push 1 | At start of combat, if unit's HP = 100%, grants Atk/Spd+3, but if unit attacked, deals 1 damage to unit after combat. | 60 | 2 |
 | Atk/Spd Push 2 | At start of combat, if unit's HP = 100%, grants Atk/Spd+4, but if unit attacked, deals 1 damage to unit after combat. | 120 | 3 | |
 | Atk/Spd Push 3 | At start of combat, if unit's HP = 100%, grants Atk/Spd+5, but if unit attacked, deals 1 damage to unit after combat. | 240 | 4 | |
 | Atk/Spd Push 4 | At start of combat, if unit's HP ≥ 25%, grants Atk/Spd+7, but after combat, if unit attacked, deals 5 damage to unit. | 300 | 5 | |
| B |  | Chill Res 1 | At start of turn, inflicts Res-3 on foe on the enemy team with the highest Res through its next action. | 60 | 3 |
 | Chill Spd/Res 1 | At start of turn, inflicts Spd/Res-3 on foe on the enemy team with the highest Spd+Res total through its next action. | 120 | 4 | |
 | Chill Spd/Res 2 | At start of turn, inflicts Spd/Res-5 on foe on the enemy team with the highest Spd+Res total through its next action. | 240 | 5 | |
| C |  | Ground Orders 1 | 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." | 60 | 1 |
 | Ground Orders 2 | 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." | 120 | 2 | |
 | Ground Orders 3 | At start of turn, 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." | 240 | 4 |
