Dallas Riordan is a fictional character appearing in American comic books published by Marvel Comics. She first appeared in Thunderbolts #1 (April 1997). Fictional character biography Dallas Riordan's comic book family had a long storied history of being police officers. Dallas was once an NYPD officer and a soldier before she went into politics and became the aide to the mayor of New York. When the Thunderbolts arrived on the scene after the disappearances of The Avengers and the Fantastic Four, the mayor wanted to take advantage of the Thunderbolts publicity and chose to appoint Dallas as the liaison between his office and the new team of "heroes". Dallas was unaware that her new associates were super villains in disguise, plotting to use their newfound publicity to get security clearances that would allow them to take over the world. Dallas quickly began a flirtation with Thunderbolt member Atlas and the two were dating when the group became exposed as villains. The Thunderbolts, led by Citizen V (by now Baron Helmut Zemo once again), soon made an attempt to take over the world. To save face, the mayor chose to blame Dallas for leading him astray and promptly fired her. A short time later, Dallas was approached by Roger Aubrey of the V-Battalion and was offered the role of Citizen V (the original Citizen V was a Golden Age hero murdered by Helmut's father Baron Heinrich Zemo), their primary field agent. It turned out that Dallas's grandfather had worked for the original V-Battalion (the majority of which were slaughtered by Heinrich). He had served in World War II but stayed in Europe to help recreate the V-Battalion with Roger Aubrey and various others, leaving his wife and son, Jim Riordan, behind. Jim raised Dallas to be tough and encouraged her desire to be a police officer. Jim did not like the V-Battalion, but he presumably wanted his daughter to be trained in combat so that she would be prepared if she ever accepted a role in the V-Battalion (as was her right, being a descendant of a member). Furious over the way her life had been destroyed by the Thunderbolts, Dallas decided to join the V-Battalion and became Citizen V. She became somewhat of a super-hero herself, first fighting Baron Zemo and then going up against the threat of the Crimson Cowl, who after knocking Citizen V unconscious, framed Dallas for