<Tr> <Th> Occupation </Th> <Td> Commander of the Grounders </Td> </Tr> <Tr> <Th> Significant other (s) </Th> <Td> <Ul> <Li> Costia </Li> <Li> Clarke Griffin </Li> </Ul> </Td> </Tr> <Ul> <Li> Costia </Li> <Li> Clarke Griffin </Li> </Ul> <P> Lexa is a fictional character from the American post-apocalyptic science fiction television series The 100, produced by The CW . The recurring television character (portrayed by Alycia Debnam - Carey) does not appear in the books on which the series is based . The commander of the allied Grounder clans, Lexa is proven to be a reasonable leader and strong warrior . She considers love a weakness, a view significantly impacted by the death of her girlfriend, Costia . Though she starts to show romantic feelings for Clarke Griffin (leader of the Sky People) and takes Clarke's views into consideration, Lexa puts her people first, even at the expense of losing Clarke's trust . </P>

When do we meet lexa in the 100