YSS Mirai, NS-X1-252, was a Nozomi-class Scout. She served in the First Expeditionary Fleet of the Star Army of Yamatai under Eikan Minato.

The YSS Mirari entered service in YE 27. It was one of the four original Nozomi-class starships (Nozomi, Onegai, Mirai, Ongaku, and Tomo)¹⁾.

During the YSS Nozomi's upgrade to the Ke-D2-6B variant in late YE 27, the YSS Nozomi's crew temporarily used the YSS Mirai²⁾. The Mirai and Nozomi upgraded each other while the crews enjoyed beach time on Kxi'ran ³⁾. During that time, the ship was captained by Ketsurui Yui⁴⁾. Yui and Hanako provided crew members with training on the Ke-M2 "Mindy" Series of Power Armor while they were there⁵⁾.

After the Nozomi was finished, the ship was under command of Taisa Eikan Minato⁶⁾. YSS Mirai frequently ferried crew and supplies to and from the YSS Nozomi⁷⁾⁸⁾⁹⁾.

The Mirai accepted a mission to rescue a stranded shuttle¹⁰⁾ and picked the shuttle up¹¹⁾, rescuing a warrant officer named Braeden Cormac. Mirai also rescued Yukisato Mizuho's escape pod¹²⁾. That year the Mirai engaged the Mishhuvurthyar along with the rest of Second Squadron¹³⁾. The Mirai attempted to negotiate an armistice with the rogue Qel'noran Empire/Qel'noran Industrial Sector after their rebellion¹⁴⁾ but was successful.