Jemma Walker. The sister of John Walker. She never liked him as the new Captain America, although she never met Steve. She thought the reasoning for him wanting to be the new America was because he was jealous of her powers. Jemma grew up in the red room from when she was 4 to the age of 17. She trained with Yelena and Natasha, and occasionally Bucky. Bucky and Jemma never got along but, when he comes to recruit her to the mission she isn't very open to the idea.