YSS Yuurei was a Plumeria-class (2D) Medium Gunship built at Gemini Star Fortress by Ketsurui Fleet Yards in YE 30 for Star Army Intelligence.

It was captured by the Mishhuvurthyar in YE 30.

See: Standard Small Starship Bridge (Plumeria Type) for locations of each station.

The YSS Yuurei was an invitation-only plot ship run by Andrew.

The Yuurei was built at Gemini Star Fortress by Ketsurui Fleet Yards.

Upon becoming the Director of Operations for Star Army Intelligence in YE 30, Motoyoshi Misato decided that she would be more effective running the Empire's intelligence branch from a mobile platform. While she maintains offices at Vicky, the Yuurei serves as her operational command. Its crew is a selected group of specialized professionals from various backgrounds within the Empire, dedicated to protecting it by any means necessary.

Misato's vision for the ship's mission profile is based on the idea of: “Saving the Yamatai Star Empire, without it realizing it is being saved.”

• The Yuurei first stopped at Pisces Station to take on crew and to do some digging in connection with the International Relations Conference of YE 30.
• The Yuurei was last known to be engaged in an investigation into the Sfrarabla Mishhuvurthyar Xhrafuklurp (SMX) Exodus. They were entering the Bufarks Debris Cloud.

• Operation Matchmaker
• Mission on hold due to the Sky Marshall being called back to Nepleslia.

• The Yuurei heads into the Bufarks Debris Cloud to investigate the disappearance of three SAINT ships and to look into the Sfrarabla Mishhuvurthyar Xhrafuklurp (SMX) Exodus.

• Motoyoshi Misato (commanding officer; committed suicide to prevent capture)
• Creighton Marks
• Motoyoshi Sayuri
• Helen Klein (escaped back to Yamatai)
• Camellia Sarri
• Hisae Hoshiko
• Maximillian Alphonse
• Mitsu Strand