Thanks to Steel!

Terra is "small teenage girl with big powers. Gifted with amazing earth-moving abilities, Terra can make rocks fly, mountains crumble, and the ground tremble beneath her feet." Terra may also have feelings for our resident animal lover, Beast Boy. However, there might be more to the "hip, funny young hero" than what initially meets the eye...After she mistakenly thinks Beast Boy told Robin their secret (that she can't control her powers), she runs off--with Slade continuing to watch her every move. She later returned to the Titans tower later on, and asked if she could still be a Titan. After gaining their trust, she became the sixth Titan to live in the tower.The Titans later found out that she was working alongside Slade--giving him information on their weaknesses, their Tower defense system and more. Though Beast Boy promised that no matter what she did, he'd never stop being her friend--but the handing of his friends over to this mad-man was too much for him to handle.Beast Boy's rejection turned Terra completely over to Slade's side, and felt no remorse till the very end about her decision. Terra took each of the Titans down, one by one, until the city belonged to Slade and her. What she didn't realize about the Titans though, is they don't go down easily--they returned to defeat her and Slade, only to find out that she had decided to leave Slade's side. Once she found she was unable to, Slade gained control of her body via the suit he had given her--it tied into her nervous system, allowing him to fight as long as she was up and willing.She turned her powers onto Slade in her last effort to save herself from a horrible fate. Though it seemed everything would be all right in the end, Terra's powers had triggered a volcano --one that would annihilate everything in it's path.