Another good sign - Shadow wasn't just taking the Emerald. Espio didn't want to get his hopes up too much, but it would definitely be a good thing if this Shadow was more like the one he had met in Garden than the one from his home reality. He wished there was a better way to figure it out, though...

Espio took a step back and then, as though to demonstrate, he used the Emerald to move in a flash of purple, teleporting from his spot by the window to just behind Shadow. "I know very well," he answered.