Grey

From Memory Alpha, the free Star Trek reference.

Grey was a Federation historian who participated in historical research expeditions using the Guardian of Forever on the time vortex planet.

In 2269, Grey, along with colleague Aleek-Om, studied data on the history of Orion, at the dawn of its civilization, and Vulcan, during the 2230s. (TAS: "Yesteryear")

The voice for Grey was performed by Majel Barrett. Her name was not spoken on screen but rather comes from the script.