First Appearance Agent Terex

Star Wars: Poe Dameron is the only ongoing title from Marvel set in the era of the new trilogy, taking place just prior to the events in The Force Awakens.  In the series Poe Dameron has already been recruited as a pilot for General Leia Organa's Resistance having formerly served in the New Republic.  The Resistance and First Order are not in open conflict, but there have been skirmishes from time to time.  The First Order is preparing for an offense against the New Republic and Poe Dameron leads a squadron of fighter pilots called Black Squadron and their main mission is to find Lor San Tekka who knows the whereabouts of Luke Skywalker.

Introduced in the second issue of the series, Agent Terex is the main antagonist for Poe Dameron.  He works for the First Order's intelligence agency and he is tasked by Captain Phasma to find Poe Dameron who "intercepted key information being passed to us by a New Republic senator".  This assignment has ensured Agent Terex crosses paths with Poe Dameron frequently and he has appeared in every issue of the series since his introduction.  Terex is intelligent, arrogant, and ruthless.  He served as a Stormtrooper in the Galactic Empire and he hopes to see the First Order assume the same dominance over the galaxy that the Empire achieved.

Star Wars: Poe Dameron #2a - Marvel Comics, U.S. (May 2016)
1st appearance of Agent Terex

Star Wars: Poe Dameron #2b - Marvel Comics, U.S. (May 2016)
1st appearance of Agent Terex

Agent Terex's first cover appearance is on the standard edition of Poe Dameron #2.  He is flanked by First Order Stormtroopers.  He does not appear on the variant cover which shows Poe Dameron in his X-Wing escaping from TIE Fighters.  The variant cover was initially released as a 1:20 ratio incentive for retailers.