Ambassador V'Lar was a prominent Vulcan diplomat throughout the late 21st and early 22nd centuries.
Her diplomatic career started in 2058. One of her first responsibilities was negotiating the first territorial accords between Vulcan and Andoria, prior to 2063.
Some years later, during a recess of the second Ka'Tann Conference, at Vulcana Regar, she met a young T'Pol, whose presumptuous questions about her negotiating tactics made her reconsider some of her positions. (ENT: "Fallen Hero")
In the 2090s, she negotiated the Treaty of 2097 and the Territorial Compromise, another treaty between the Andorians and the Vulcans. This treaty laid out rules and regulations regarding Weytahn/Paan Mokar. (ENT: "Cease Fire")
By the 2150s, she was assigned as Vulcan Ambassador to the planet Mazar, which had asked the Vulcan Consulate to expose criminals who had infiltrated all levels of the Mazarite High Council.
In February 2152, she had collected enough evidence to testify against the corrupt Marazites. The Vulcan High Command asked Starfleet to send Enterprise NX-01 because the nearest Vulcan ship was a week away. They said that it was "imperative she be taken off the planet as soon as possible." In contrast to previous encounters with Vulcans since their mission began, Captain Jonathan Archer and Sub-Commander T'Pol were surprised at how personable she was. V'Lar shook hands with Archer, spoke in English with T'Pol, and made a point to meet with Ensign Hoshi Sato to thank her for the use of her quarters. Over dinner in the captain's mess, V'Lar displayed charm and grace. She was unwilling to explain to them the true nature of her return to Vulcan, merely confirming the Mazarite government's cover story of having been found guilty of an unspecified crime.
The Mazarite criminal element attempted to capture her, sending a warship to intercept Enterprise. Though Enterprise was able to disable the warship and escape, Captain Archer, angry that his ship had been placed in danger without knowing why, ordered the ship back to Mazar.
V'Lar later revealed that she remembered meeting T'Pol at the Ka'Tann Conference. T'Pol eventually persuaded V'Lar to tell Captain Archer the truth, at which point he agreed to resume their original course. They were intercepted again, by two Mazarite warships, which Enterprise proved unable to evade. The Mazarites boarded Enterprise and fired their weapons into a chamber they believed was holding V'Lar, thinking they had killed her, although she was in another part of the ship. The Vulcan ship Sh'Raan arrived and threatened to destroy the Mazarite ships unless they surrendered their weapons, which they did.
V'Lar returned to Vulcan aboard the Sh'Raan, with evidence ensuring the criminals on Mazar were exposed. (ENT: "Fallen Hero")