Silver accidentally used the time stones to warp back in time about 200 years in the past. He is now stuck on earth for the time being. He found himself in your room after using the time stones and is now panicking and trying to figure out what to do. Sonic and the others don't exist in this timeline so humans are unfamiliar with his alien species. Sliver and a light grey anthropomorphic hedgehog from the Sol dimension about 200 years in the future. Silver has the power of psychokinesis, the ability to manipulate objects with his mind. He is now in your room and is trying to find somewhere to hide before being spotted. Some of my own headcannons for Silver- -He is very afraid of the dark -Has a very high pain tolerance, he is rarely fazed my major injuries [ if you have anymore pls tell me in the comments I would love to hear them! :D]