Ghrex was a female Denobulan engineer who served with the Starfleet Corps of Engineers aboard the USS Lovell in the 2260s.
In 2263, Ensign Ghrex piloted the "Mole", a mining vehicle, in the effort to excavate the caved-in areas of Federation Outpost 5. (SCE eBook: Foundations, Book One)
In 2265, Ghrex participated in the Lovell's mission to Vanguard. (SCE eBook: Distant Early Warning)
By 2267, Ghrex had been promoted to Lieutenant. That year, she was part of the team from the Lovell assigned to help the society of Beta III recover following the deactivation of the computer Landru. (SCE eBook: Foundations, Book Two)