|Captain||Lindy Harlaown (TOS, A's)|
Hayate Yagami (StrikerS)
|Allegiance||TSAB Dimensional Navy|
Riot Force 6
|Japanese name||アースラ |
|First app.||Nanoha (ep.7)|
|Last app.||StrikerS (ep.26)|
Arthra (アースラ Āsura) is a TSAB investigative spaceship under the command of Lindy Harlaown in the original series, the A's manga, and A's. In the course of the final Book of Darkness incident in A's, it is retrofitted with an Arc-en-ciel.
In StrikerS manga, Arthra is still in service, with Chrono as her captain, but in StrikerS, TSAB already plans to scrap her. Riot Force 6 requests to use her as their temporary HQ while the Long Arch undergoes repairs.
The first fan translations of the series rendered the ship's name as "Asura", after a race of celestial beings in some oriental religions and mythologies.