original_query: Who is Michelle and why is there a loophole due to her being from the future?
query: Who is Michelle Carter and why is there a loophole due to her being from the future, in the context of Booster Gold's story?
answer: Michelle Carter is Booster Gold's twin sister, also a superheroine (Goldstar).  A loophole exists because, being from the future, her death is not fixed in time and therefore might be preventable.