Do you want to compare U.S.Agent with Amethyst? Discover the powers, weakness & weapons of U.S.Agent and Amethyst from U.S.Agent Biography and Amethyst Biography. Find out all about U.S.Agent and Amethyst.# Check out how is U.S.Agent unique and distinct from Amethyst. Discover their love interest, sidekicks, family tree and the movies and games list in which U.S.Agent and Amethyst have appeared. Find out everything about them here!