Missions given
 Missions Involved
- “A Step Between Stars” - Lt. O'Brien is among the Enterprise-F crew assembled at Dyson Sphere Joint Command prior to launching the mission to rescue and assist Admiral Tuvok.
Kirayoshi is the second child of Miles and Keiko O'Brien and was born aboard Deep Space 9. He has an older sister named Molly.
Dialogue in the mission "Sphere of Influence" mentions that the Chief Engineering Officer of the Federation's flagship, the U.S.S. Enterprise-F, is named O'Brien. According to Kestral's writing in Star Trek Magazine and her dialogue prompts to Dave Rivas for "Sphere of Influence" indicates that this is Kirayoshi.
- Kirayoshi O'Brien at Memory Alpha, the Star Trek Wiki.
- Kirayoshi O'Brien at Memory Beta, the non-canon Star Trek Wiki.
Leonard James Akaar • Borg Queen • Richard Castillo • Female Changeling • Donatra • D'Tan • Icheb • Kahless • Klag • Laas • Lamat'Ukan • Leeta • Leskit • Madred • Leonard McCoy • Morn • Kirayoshi O'Brien • Miral Paris • Q Junior • Alexander Rozhenko/K'mtar • Sirella • Montgomery Scott • Sela • Spock • Taris • Tuvok • Naomi Wildman • Worf • Natasha Yar