Peggy Carter
In "Exiles" Vol. 3, a version of Bucky's sister, Sgt. Rebecca "Becky" Barnes, a reincarnation of his granddaughter Rikki, fights against the Axis Powers alongside Peggy Carter, the Captain America of that universe. She joins the Exiles and enters into a relationship with Valkyrie, before joining the Future Foundation after being reincarnated once again.