Daughter of Miles and Keiko O'Brien, born aboard the Enterprise-D and raised on Deep Space Nine.
Molly O'Brien is the first child of Miles and Keiko O'Brien. She was born aboard the USS Enterprise-D in The Next Generation episode Disaster, delivered by Worf in Ten Forward during a shipwide emergency, and she moves with her parents to Deep Space Nine when her father becomes the station's chief of operations.
In Time's Orphan, eight-year-old Molly falls through an abandoned time portal during a family picnic on Golana. When her parents recover her, she has lived alone for ten years and returns as a feral eighteen-year-old. Rather than see her institutionalised, the O'Briens send her back through the portal, where the older Molly guides her younger self home and vanishes from history.
Molly grows up on the station alongside her younger brother Kirayoshi. After the Dominion War, she moves with her family to Earth when Miles takes a teaching post at Starfleet Academy. She was played by Hana Hatae.