An archaeologist, with a habit of pursuing her studies with unethical zeal as a profiteer, who falls in love with Picard.
She first appeared in the Star Trek: The Next Generation episode "Captain's Holiday," in which Jean-Luc Picard vacationed on Risa. Vash had discovered the Tox Uthat, which artifact thieves were determined to take from her; with Picard's help, the thieves were thwarted. During this adventure, she and Picard fell in love.
They met up again in the episode "Qpid," in which Vash became annoyed on finding that none of Picard's senior staff had even heard of her, despite his explanation that he is "a very private man." Q abducted her and the Enterprise senior staff, casting them into a Robin Hood scenario, with Picard playing Robin Hood and Vash as Maid Marian. The result was Vash leaving with Q to the Gamma Quadrant, to scour archaeological sites there.
Vash reappeared in the Star Trek: Deep Space Nine episode "Q-Less" two years later, in which episode she mistook for an artifact an "egg" which subsequently hatched as a lifeform