Doctor Helen Cho (Korean: 조헬렌) is a world-renowned geneticist and the leader of the U-GIN Research Group. She was called to assist the Avengers with her research and technology in the war against HYDRA, asking her to treat Clint Barton. Later, she was approached by Ultron who enthralled her to create a new body for him. However, Wanda Maximoff undid Cho's control and she managed to corrupt the process of the creation, although Ultron almost killed her for that.