Mefodiy Sokolov is the youngest son of Nikolas and Mariya. His personality is much like his father's determined but humble in his leadership abilities within the family.
Eva is the daughter of Mefodiy's eldest brother, the now deceased Vladimir.
After a plot in which Vladimir nearly killed Nikolas and Mefodiy, he was murdered by Eva as she defended both men from her own father's final attempts. During the encounter, Vladimir revealed that he wasn't even Nikolas' child, but the result of an infidelity.
Before this occured, the close relationship that Mefodiy and Eva shared developed into something more that, outside of their own culture, is quite scandelous.
With so many ties and literally life or death, this makes these two BtV's Couple of the Month!