<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> <P> Lexa has been well received by critics and fans, who consider her to be one of the show's more interesting and complex characters . She has been a source of frequent debate; one topic is how she was written off the series . Her relationship with Clarke, which was viewed as compelling, significantly impacted the LGBT community, and many viewers embraced it as a positive or tempestuous depiction of friendship, love, and betrayal . The relationship was, however, criticized for being unnecessarily tragic, leading the "bury your gays" trope to rise to a national debate . </P>

When does the commander die in the 100