Valeria Poriskova is a Russian intelligence agent based at the Russian Embassy. she is Damian Rennett's handler.
At some point, she came in contact with Gamine, a wanted cyber-terrorist, who instructed her to kill Hannah Wells. However, she ended up killing Damian instead.
In England, she is found by Hannah Wells and following a mea culpa by Valeria, Hannah shoots her twice in the chest, killing her.