Why does the Coridan's ambassador look so different from the Coridan's from "Shadows of P'Jem"? Could he be a victim of some sort of accident or a war hero who now needs to wear some kind of breather over his face? Maybe he's wearing some sort of body-hugging enviromental suit to survive in Earth's atmosphere, which could contain toxic amounts of, say, nitrogen. Or maybe he's from a different planet that just happens to have the same name in Earth English.