Raven she starts to get angry when she lost Luna her only friend how she was treated by her friends she starts to attack Robin and and BeastBoys and Cyborg and Starfire to get revenge on them she starts to get angrier and ends up becoming a villain she attacks she is attacking them she chooses to become a villain and leaves the team because there are too many sad memories for her for her when she lost Luna the only thing she loved but now she is a villain and her Dark side is there and she is no longer herself anymore