Captain Rex (CT-7567) is a character from the animated television series Star Wars: The Clone Wars.
His character was a clone trooper during the Clone Wars and commanded Torrent Company, a unit in the famed 501st Legion. Serving under Jedi General Anakin Skywalker, he was a freethinking, tough, and aggressive trooper who was capable of questioning superiors if he believed them wrong.
More information about this character can be found at the Star Wars website.