Una

Una is a Human female who lives in the 23rd century and services the Federation, Starfleet as First Officer onboard the USS Enterprise (NCC-1701) under the command of Captain Christopher Pike. (Star Trek: First Frontier)

Early Life
Una Number One was born on the planet Illyria in the early 23rd century.

During her formative years, Number One was raised in the Illyrian colonies alongside her brothers, Hudek and Leighton. With her given Illyrian birthname considered to be all but impossible for outsiders to pronounce, she adopted the name "Una" (signifying the concept of "one") at least as far back as her Starfleet Academy days, always having been first in her class regarding academics, athletics, intellect, and accomplishments, subsequently being dubbed "Number One" as a variation on this by her classmates.

In the late 2230s, Number One studied at the Illyrian Cultural Academy in order to be invested as a citizen of Illyria. Following her graduation as first in her class in 2240, she was awarded a plaque recognizing her achievement, at a ceremony which was attended by her brothers.

Starfleet Academy
By 2245, Robbins had entered Starfleet Academy and had specialized in engineering. In this year, Robbins and a large group of cadets were assigned to the newly-built Constitution-class starship, NX-0002, which would become the famous USS Enterprise, for her shakedown cruise, under the command of Admiral Charles Rasmussen. For the duration of the cruise, Robbins was assigned to engineering, under the direction of Lieutenant Cho.

USS Fortune
In the mid-to-late 2240s, Robbins, with the rank of ensign, served aboard the USS Fortune in the engineering department. During an attack by an unknown alien vessel, she was instrumental in saving 27 of the crew from the ship's destruction while in orbit of Tau Alpha III.

USS Ventura
By 2248, Robbins had been promoted in rank to lieutenant, junior grade and was serving aboard the USS Ventura. Following a mission to Beta Eridani III, she accepted a transfer to the Enterprise and a promotion to lieutenant.

USS Enterprise
Almost as soon as she arrived on the Enterprise, Robbins came to Captain Robert April's attention and earned herself a position as part of a landing party, led by Lieutenant Commander Christopher Pike, to planet Alpha Tau IV.

In October 2249, a routine followup survey expedition to the Libros star system by the Enterprise discovered an extradimensional incursion by a hostile alien species (the Jatohr) who had enslaved the indigenous population of planet Libros III (called "Usilde" in the native tongue). A disastrous landing party expedition commanded by Una resulted in the entire party (except for Robbins/Una) being sent into a parallel universe with little hope of rescue, although the Ptaen incursion was repulsed and the sluglike aliens likewise exiled back to their native reality. However, a piece of technology known as the Transfer Key was recovered by Captain April, and Una resolved to eventually rescue her comrades, despite potentially taking decades to do so.

By 2250, Robbins was the Enterprise's helmsman, and part of the senior staff. She had served aboard the Enterprise for three years, refusing every promotion that was offered to her.

In 2254, following an attack by a mysterious alien race, the Ngultor, Number One led a landing party to rescue Captain Pike from Ngultor captivity (EV comic: "Flesh of My Flesh"). On the Enterprise's next mission, in the Marrat Nebula, Number One led another landing party, this time to investigate a loss in communications at Starfleet's Project Pharos. Shortly after beaming down, the party came under attack from Klingons, Number One used the transporters to beam in behind the Klingon attackers and neutralize them before rescuing a team of Starfleet engineers the Klingons had been holding captive. On the Enterprise's next mission, in the Marrat Nebula, Number One led another landing party, this time to investigate a loss in communications at Starfleet's Project Pharos. Shortly after beaming down, the party came under attack from Klingons, Number One used the transporters to beam in behind the Klingon attackers and neutralize them before rescuing a team of Starfleet engineers the Klingons had been holding captive.

Following a disastrous visit to Rigel VII, Number One and the Enterprise found themselves visiting the mysterious planet Talos IV where Captain Pike was taken captive by the native Talosians. Determined to rescue the Captain, Number One once again led a rescue party. Unfortunately the Talosians were able to manipulate the Enterprise's transporters delivering only Number One and Yeoman Colt into the Talosian habitat. The entire party later escaped.

Very shortly following the Talos IV incident, the Enterprise was sent to a rift that opened every 33 years into the Gamma Quadrant of the galaxy. The starship received brand-new, highly-advanced computer voice modules, with her own voice-patterns subsequently imprinted upon the Enterprise's computer, which lead to her voice being used in future years.

The Enterprise was then recalled back to Earth for a debrief and crew restock. While passing by Jupiter, Pike confided in Number One regarding his doubts about remaining a captain before a Halogian ship was detected, firing a beam of intense heat into Jupiter. Leaving Number One to engage them ship-to-ship, Pike led an away team aboard the alien craft, successfully sabotaging its systems and destroying it.

Not long after, Pike left Number One in command of the Enterprise while he led a landing party to Darien 224. She was forced to take the starship into battle when they were attacked by the USS Cortez, which had been commandeered by a group of hostile Vulcans. The Enterprise stopped at Deep Space Station K-12 to receive repairs following the incident, and Number One was left in charge again when Pike left for Earth after hearing his father was ill. However, it soon became apparent that the message had been faked; unfortunately, the message was too degraded to track it to its point of origin. Fortunately, someone sent a screened untraceable message to the Enterprise informing them of Pike's location, and Number One was able to take the Enterprise to rescue him from his Klingon adversaries who had set the trap.

In 2255, the Enterprise crew became stricken with Rigelian fever, with Captain Pike ordering the starship to Cypria III, location of the rare substance ryetalyn, the only known curative. However, en route, the ship intervened in a pursuit involving the adopted Cyprian daughter of a Klingon general, which threatened to bring down a sizeable military response against both the Enterprise and Cypria III. Planetside, Number One was forced into action to rescue her landing party from a hostile population riled up by opportunistic politicians against them, resulting in a diplomatic incident. However, Number One succeeded in saving her crewmembers and returning to the Enterprise, and both the Rigelian fever and the Klingon situation were soon resolved.

In 2256, war broke out between the Klingon Empire and the Federation. The Enterprise however was so far from the front lines that were ordered to remain on their exploration mission, being kept in reserve as a last ditch weapon.