A member of the Fatal Five.

Chi Tsan of Earth is the real name of the villain Caress. Unsatisfied with what could be gained with the wealth her family possessed, Chi Tsan took to a life of theft to get what she wanted. Having studied martial arts, Chi Tsan became a mercenary. She took a mission of the Khunds in exchange for having Khundian technology give her greater power. Increasing the strength in her arms and her ability to grip, the Khunds also mutated Chi Tsan's glandular system to give her an acid touch which was capable of burning through anything organic.

When the Emerald Empress was reforming the Fatal Five after the loss of Tharok and Validus, she approached Caress and offered her a place in the group. This put Caress in direct conflict with the Legion of Super-Heroes.