Updated: Apr 28
Katya (full name Yekaterina Timofeevna Luneva) is one of Sam's potential love interests.
Katya herself is an immigrant - she immigrated from Tver, Russia, at the age of 10 with her family (her parents and her younger sister, Liza). This means that, unlike Sam, she has memories of her growing up in another country. Sam, in contrast, only knows what his parents told him about Odessa.