Katya Volskaya is the CEO of Volskaya Industries. Based on Zarya's and Sombra's words, she is considered "a hero of her people", "the defender against the omnics", and "the most powerful woman in Russia". It could mean she and her company did something very profound for Russia, which is implied to be the creation of mech like Svyatogor to help Russia in the Omnic Crisis.
In Infiltration, Katya was supposed to be assassinated by the likes of Sombra, Widowmaker and Reaper, only to end up getting blackmailed by Sombra instead. It was revealed that Katya had secretly collaborated with the Omnic's in exchange for their technology for Russia's anti-Omnic weapons production which Sombra exploited to her favor with the threat of revealing it worldwide. After the Talon Navigation mission failed, Katya is seen talking personally with somebody, and giving her a task, with the intention of it kept unknown. That "somebody" was later revealed to be Zarya, as the shadows uncovered her.
Katya is assumed to have a daughter, as seen in the pictures on her office desk.