As one of the characters in the movie, she plays a young Russian interpreter named Sasha, who helps Henk Rogers in communicating with the Soviets.

Source: https://screenrant.com/tetris-cast-character-guide/

A zanily mustachioed Taron Egerton stars as the Dutch designer Henk Rogers, while Nikita Yefremov plays the game's Russian inventor, Alexey Pajitnov.

Source: https://mashable.com/article/best-game-movie-adaptations

But the meat of it is centered in Moscow, with Henk Rogers–the most whitebread part-Indonesian you ever will see–finding out that the Tetris licensing rights he purchased are a sham.

Source: https://411mania.com/movies/tetris-review/

Henk Smits adds: “We like to use the walls and the floor together.

Source: https://www.baltimoregaylife.com/kunstcommissie-stadshuus-has-exciting-plans/