Star Trek Picard
Oh was a female Romulan/Vulcan hybrid flag officer in the Tal Shiar with the rank of general, loyal to the Zhat Vash, and part of the Conclave of Eight. She became integrated into Starfleet as a mole, where she worked her way up through the ranks to eventually become a commodore and served as the director of Starfleet Security.
The Qowat Milat was an order of Romulan warrior nuns. They were an all-female group; while a male could train in their ways, he could never truly be one of them. The Qowat Milat was the most feared enemy of the Tal Shiar, and, by extension, the Zhat Vash. (PIC: “Absolute Candor“)