Roeg was transformed into a Titan by Zeke Yeager during the Marleyan surprise attack on Shiganshina.
Roeg was an older, middle-aged man. His hair was cut short, and he had a receding hairline. He was seen wearing glasses, a dress shirt and dark pants, as well as possessing the standard Military Police jacket, although he did not wear it in casual settings. He wore a bolo tie similar to that of his fellow military commanders.
Roeg was a very rude and somewhat cowardly man, casually speaking of and criticizing others behind their backs. He seemed to place a value in public appearances, showing great contempt for Historia Reiss's decision to mother a child with a simple farmer, and not having a public wedding; furthermore, he criticized and mocked her on the fact that she was a nobody before she took power.
Appearance: Roeg was an older, middle-aged man. His hair was cut short, and he had a receding hairline.
Personality: Roeg was a very rude and somewhat cowardly man, casually speaking of and criticizing others behind their backs. He seemed to place a value in public appearances, showing great contempt for Historia Reiss's decision to mother a child with a simple farmer, and not having a public wedding; furthermore, he criticized and mocked her on the fact that she was a nobody before she took power.
Roeg in the story: Roeg attends a meeting with other officers in the Military Police, ridiculing Nile Dok's misgivings at Paradis's decision to arrest the Anti-Marleyan Volunteers. Roeg defends the decision, arguing that they cannot afford to let the volunteers roam free when they know nothing of Zeke Yeager's true intentions, before lamenting that they were not able to have Historia eat Zeke immediately due to her pregnancy. Nile argues that Historia has the right to choose when and by whom she becomes pregnant, but Roeg posits that someone from the volunteers, likely Yelena, gave Historia the idea to get pregnant immediately so that she will not be forced to turn into a Titan until after she delivers.
Source: Attack on Titan Wiki, available under CC BY-SA 3.0.