Rosier: "When we’ve won, they’ll flee cities in the millions. They’ve had their time"
Grindelwald: "We don’t say such things out loud. We want only freedom. Freedom to be ourselves."
Rosier: "To annihilate non-wizards."
— Vinda Rosier regarding Non-magic community (CG)
Vinda Rosier was one of Grindelwald’s lieutenants having joined him sometime before 1927. When Queenie was distraught after having argued with Jacob, Rosier took her to a safehouse where Grindlewald was residing. She comforted Queenie and presented her with an ever-refilling teapot but when Queenie announced she wanted to leave Rosier ushered in Grindelwald to implore her to join his side. She was also at Grindelwald’s Rally in the Lestrange mausoleum in support of him but disapparated away when the Aurors converged. (CG)
The Rosier family is one of the Sacred Twenty-Eight and a pure-blood wizarding family.
Other canon notes and references
The witch is named “Rosier (female)” in the original screenplay but the first name Vinda is used in Potttermore https://www.pottermore.com/features/a-guide-to-the-new-characters-from-fantastic-beasts-the-crimes-of-grindelwald
Primarily Germanic and Norse origin the name "Vinda" means "to wind or twist"
Rosier is a French name that means "rose bush" and is also is the name of a fallen angel and the patron demon of seduction and tainted love.
The witch is named “Rosier (female)” in the original screenplay but the first name Vinda is used in Potttermore https://www.pottermore.com/features/a-guide-to-the-new-characters-from-fantastic-beasts-the-crimes-of-grindelwald and the book Fantastic Beasts: The Crimes of Grindelwald Movie Magic.
According to Fantastic Beasts: The Crimes of Grindelwald Movie Magic by Jody Revensen her wand "has many twists and turns and was crafted with a purple sheen".