Played by Kwon Seung Woo, Ma Seong Gyu became a doctor at his mother’s insistence but believes that, in the harsh reality of the medical profession, the person who manages to endure is ultimately the winner. With his attitude resembling that of an ordinary office worker who makes compromises to get through each day, he has brought both humor and a bittersweet sense of relatability to the drama. However, his once-peaceful routine begins to unravel when Gye Su Jeong (Kim Ji Won) suddenly appears at the hospital. In recent episodes, he has shown a different side, finally speaking up to defend the goals he has pursued for years and his values as a doctor.
Kwon Seung Woo conveys Ma Seong Gyu’s transformation through his resolute gaze and determined delivery. In one scene, he reads a note left by intern Park Tae Kyung (Kim Woo Seok) and lets out a deep sigh, revealing the complicated emotions stirred by memories of his own difficult past. His tender side as an uncle when interacting with his nephew, as well as the tears he eventually sheds after reading a text message from his colleague, Professor Bae Heung Gon (Lee Sung Wook), have also caught viewers’ attention.
Born in 1987, Kwon Seung Woo made his debut in 2006 with the stage production The Most Beautiful Goodbye in the World. He went on to build his acting career through theater productions such as Liar, Rooftop Cat, and Night of the Brothers. He made his television drama debut in 2019 with JTBC’s Flower Crew: Joseon Marriage Agency, followed by an appearance in tvN’s Hospital Playlist. In 2021, he gained wider recognition for playing Monk Chae Shin in tvN’s Vincenzo. He even shaved his head for the role and shared the screen with Song Joong Ki and Jeon Yeo Been.
He later transformed into Han Byeol, an office worker known for his quirky fashion sense, in Yumi’s Cells. His other credits include Soundtrack #2, Newtopia, Beyond the Bar, and My Youth. More recently, he took on a villainous role in SBS’s Flex X Cop 2. Doctor X: Mafia in White airs every Friday and Saturday at 9:50 p.m. KST.
Sources: Nate