Captain Valdez is an NPC, a Rebel Officer on Hoth.
The Enemy Let Slip Edit
At the Rebel base hangar, Major Derlin wanted to send a platoon to protect the Claburn Range, but Captain Valdez told Derlin not to be an idiot. Han and Chewbacca were working on repairing the Millennium Falcon. Chewbacca didn't think it was ready for such a hasty departure. Han insisted it'd be okay once the hyperdrive was- Han was interrupted midsentence as the hyperdrive he'd been working on made a loud kaboom.