Semi is an hedgehog but people call him "time traveler" bescause he is like Silver. You read sonic comics? Well in sonic comics Silver is time traveling and looking for sonic. So lets get started with Semi's story. In other galaxy/dimension is living an evil doctor that is trying to destroy Blaze the cat he is called Dr.Eggman Nega! He was planning do an hedgehog that would destroy Blaze,and it took long time when it was done. But when Nega finished his project Semi was gone,he wasn't in the lab he was in freedom! Then his adventures started!