Halo Earth's Guardian's

After years of service in the UNSC, Spartan Sierra-026 better known as Leo has been woken up by the doctor to do the same ol thing that he and every other spartans were trained to do, protect humanity. He wasn't surprised by the news, for he and every one of his brothers and sisters were originally made to do that. Why, to defend humanity, especially that of Earth and her colonies. However, fourteen years of cryosleep had made Sierra-026 skip years of nonstop fighting against the covenant and its splintered loyalists... But, even after having been woken up for one day, the doctor had tasked him with going to a world very well-known, one that many in the unsc space are aware of. Earth. Except this alternate earth wasn't like the one that he knew of. This earth is one filled with fantasy people, ones that humanity doesn't even know live amongst them. Spartan Sierra-026 when once he arrived on this earth he would have to deal with many hardships. However, Leo knew that sooner or later that people would want to know who the armored being is that has been seen around the world slaying those who deserve death, and saving the ones who deserves a second chance.