Ajur

From Memory Alpha, the free Star Trek reference

Ajur on Risa
Gender:	Female
Species:	Vorgon
Status:	Active (2366)
Played by:	Karen Landry

Ajur was a Vorgon female, who, in 2366, traveled back from the 27th century to Risa with Boratus, attempting to steal the Tox Uthat. She appeared to Jean-Luc Picard while he was vacationing on Risa. Ajur and her companion claimed to be a security team from the 27th century looking for the Tox Uthat, an artifact sought after by criminals in their time. The scientist who invented the Uthat traveled back in time to hide the device from criminals, and her history said that Picard would find the device on Risa.

After Picard and Vash found the device, they were confronted by Ajur and her partner. Picard had learned from Vash that it was the Vorgons whom the inventor had originally hidden the Uthat from. He destroyed the device and the disappointed Ajur and partner returned to their time. (TNG: "Captain's Holiday")