Shadow to Clyde Arrowny in end credits

Regarding Terra's last name, it is possible that her last name was given in Vector because her mother died at an early age. I highly doubt Espers hold last names (unless the creators say they do) and even if they do, it would be unlikely for the Empire to Terra who her father was. After all, she grew up in Vector when Emperor Gestahl kidnapped her and placed her father is a capsule.