For Molly's younger life please click here

Molly was the first born of Chief Miles O'Brien and his wife Keiko aboard the USS Enterprise-D in 2368 (stardate 45156.1)

(TNG: "Disaster")

In 2369 Molly moved aboard Deep Space 9, when her father got a new assignment there.

(DS9: "A Man Alone")

Miles often told Molly bedtime stories. One of her favorites was "Rumpelstiltskin". However, later Rumpelstiltskin appeared in Molly's room and wreaked havoc on the station until the crew realized he was a figment of their imagination. Before being defeated, Rumpelstiltskin offered to save the station in exchange for Molly. Miles was reluctant, but then the crew made a breakthrough and the O'Briens were allowed to keep their daughter.

(DS9: "If Wishes Were Horses")

Later that year, when Kai Opaka visited the station and came in contact with Miles O'Brien, she knew that he had a daughter and gave him her pendant to give to Molly.

(DS9: "Battle Lines")

Molly temporarily left the station with her mother for her safety. She returned shortly after.

(DS9: "The Siege")

She attended a day care on the station. She went through the phase of not wanting to be near her father, and when Miles offered to drop her off at day care, Keiko said she was taking her to school with her so that Molly could experience a Vulcan program that taught basic problem-solving skills.

(DS9: "Whispers")

Molly went with her mother on a botany expedition that lasted several months. When she returned, Miles was eager to spend the two days he had with her, but Molly wasn't feeling well. Later, however, she said she felt "lots better." The day after, Molly again left with Keiko for half a year more of the trip. Miles told her to take care of her mother for him.

(DS9: "Fascination")

Six months later, Molly returned to Deep Space 9 with her mother. Molly was the one to tell her father that Keiko was pregnant again, this time with her little brother. Miles was looking forward to spending a lot of time with Molly, and tried to teach her how to play darts. While Molly had a good aim, she grew bored with it and opted to color instead. When she drew a pony, Miles asked if it had a name, but Molly said she "didn't know."

(DS9: "Accession")

Molly loved to color, and often did so after dinner. She was, however, in charge of putting her plate in the replicator. She attempted to show Miles one of her drawings, but he got irritated and lashed out at her. She began to cry, and when Miles tried to apologize, Molly was too upset to listen. However, she later forgave her father, and welcomed him home with a hug and a "Daddy's home!"

(DS9: "Hard Time")

In 2373, Keiko went on a five-day trip to Bajor. During this time, Miles was to care for her plants. However, in a combined effort with Julian, he managed to kill a species of plant. Molly left her room and saw the dead plants, and warned her father that he would be in trouble. When Miles suggested that Molly be the one to break the news to her mother, she responded, "Not me!" After Keiko returned, she threw Miles a surprise birthday party. Molly was present, and wore her new purple shoes just for her father. She also contacted her father at work to say hello.

(DS9: "The Assignment")

Molly's younger brother, Kirayoshi, was born in 2373, and was carried by Kira Nerys after a shuttle accident. During this time, Molly sometimes referred to Kira as her aunt.

(DS9: "Body Parts", "The Begotten")

Before the Dominion takeover of Deep Space 9 and the start of the Dominion War, Keiko took Molly and Yoshi to Earth for their safety.

(DS9: "Call to Arms")

Both Molly and Kirayoshi moved back to Earth with their parents in late 2375, when Miles accepted a position as Professor of Engineering at Starfleet Academy. Initially, Molly wondered if they were not going back to Earth, because Miles had not informed Julian Bashir, his best friend. However, she was told that they were indeed going. Molly also showed interest in her father's model of the Alamo. When Miles warned her not to touch it, she retorted that she let him play with her toys.

(DS9: "What You Leave Behind")