| Name | Cooldown | Description | SP | Required |
|---|---|---|---|---|
| Astra | 4 | Boosts damage dealt by 150%. | 200 | Night Sky |
Cannot use: 
| ||||
Notes[ | ]
- The Special damage boosting effect of Astra can be reduced by damage-reduction effects such as
Gust, Atk/Spd Excel, and Dodge.
- A foe equipped with
Embla's Ward, 
Múspellflame, 
Niðavellir Axiom, File:Nine-Realm Pact.png Nine-Realm Pact, or Gold Perfection will neutralize all sources of damage during combat except the minimum 1 damage from Umbra Burst weapons. - For more information, see Damage calculation.
- A foe equipped with
List of owners[ | ]
| Unit | Skill chain | |||
|---|---|---|---|---|
 | Night Sky 4  | Astra 4 | – | – |
 | Night Sky 5  | Astra 5 | Regnal Astra 5 | – |
 | Night Sky 5 | Astra 5 | Supreme Astra 5 | – |
 | Night Sky 5 | Astra 5 | Galeforce 5 | – |
 | Night Sky 5 | Astra 5 | Galeforce 5 | – |
 | Night Sky 3  | Astra 4 | Galeforce 5 | – |
 | Night Sky 5 | Astra 5 | Galeforce 5 | – |
 | Night Sky 5 | Astra 5 | – | – |
 | Night Sky 5 | Astra 5 | Nimble Beast 5 | – |
 | Night Sky 3 | Astra 4 | – | – |
 | Night Sky 5 | Astra 5 | Regnal Astra 5 | – |
 | Night Sky 5 | Astra 5 | Regnal Astra 5 | – |
 | Night Sky 5 | Astra 5 | Njörun's Zeal 5 | – |
 | Night Sky 5 | Astra 5 | Njörun's Zeal 5 | Njörun's Zeal II 5 |
 | Night Sky 5 | Astra 5 | Galeforce 5 | – |
 | Night Sky 5 | Astra 5 | Vital Astra 5 | – |
 | Night Sky 5 | Astra 5 | Galeforce 5 | – |
 | Night Sky 3 | Astra 4 | – | – |
 | Night Sky 5 | Astra 5 | Galeforce 5 | – |
 | Night Sky 5 | Astra 5 | – | – |
 | Night Sky 3 | Astra 4 | – | – |
 | Night Sky 5 | Astra 5 | Imperial Astra 5 | – |
 | Night Sky 5 | Astra 5 | Galeforce 5 | – |
 | Night Sky 5 | Astra 5 | Vital Astra 5 | – |
 | Night Sky 3 | Astra 4 | – | – |
 | Night Sky 4 | Astra 4 | Galeforce 5 | – |
 | Night Sky 5 | Astra 5 | Galeforce 5 | – |
 | Night Sky 4 | Astra 4 | Galeforce 5 | – |
 | Night Sky 3 | Astra 4 | – | – |
 | Night Sky 4 | Astra 4 | – | – |
* Alfonse: Prince of Askr, Sharena: Princess of Askr, Anna: Commander, and Forma units cannot be used for skill inheritance or turned into combat manuals.
** Rearmed and Attuned Heroes cannot be used for normal skill inheritance or turned into combat manuals after using their Arcane/Elite Inheritance unless their Arcane/Elite Inheritance is restored via merges.
Alfonse: Prince of Askr, 
Sharena: Princess of Askr, 
Anna: Commander, and 
Forma units cannot be used for skill inheritance or turned into combat manuals.**
Rearmed and 
Attuned Heroes cannot be used for normal skill inheritance or turned into combat manuals after using their Arcane/Elite Inheritance unless their Arcane/Elite Inheritance is restored via merges.Trivia[ | ]
- Astra's cooldown was reduced by 1 with Version 2.0.0, released on November 28th, 2017.
In other languages[ | ]
| Language | Name |
|---|---|
| Japanese | 流星 |
| German | Astra |
| Spanish (Europe) | Fobos |
| Spanish (Latin America) | Astrea |
| French | Stellaire |
| Italian | Astra |
| Traditional Chinese (Taiwan) | 流星 |
| Portuguese | Astro |