High Quality Content by WIKIPEDIA articles! Alexandra "Alex" Udinov is the deuteragonist of Nikita, portrayed by Lyndsy Fonseca. Many fans of "Team Nikita" (consisting of Nikita, Michael, Birkhoff, Sean, Ryan, and Owen) consider Alex as the baby of the "family," this is because Alex, being the youngest of the group when her walls are down, she can behave childlike and callow.