Yoon Seo-ah
Im Sun-woo, known by her stage name Yoon Seo-ah, is a South Korean actress. She is known for her supporting role as Seo Ji-wan in the Netflix series Nevertheless.
Career
In her high school days, Yoon joined a short film production club.Yoon debuted as an actress with the 2018 drama series Bad Papa, and later appeared in another series named Love Revolution. She also appeared in one episode of True Beauty, playing a teenage Lim Hee-kyung.
In Nevertheless, Yoon played Seo Ji-wan, the best friend of Yoon Sol. With the role, the two became known as a love team, and Yoon became popular. Her performance with Lee Ho-jung was noted by allkpop.com as one of the most remarkable examples of LGBT representation in Korean drama.
Throughout 2022, Yoon portrayed guest roles such as Go Hye-rim in Juvenile Justice and Kim Seo-yeon in Soundtrack#1. She also played a supporting role as Ddong-geum in Bloody Heart. Later, she played the supporting role of Oh Nu-ri in drama Today's Webtoon.
In 2024, Yoon portrayed Chae Young-ji in the Netflix sci-fi dystopian series titled Goodbye Earth. She starred as Baek Yi in the JTBC romance historical drama titled The Tale of Lady Ok, alongside Lim Ji-yeon, Choo Young-woo, Kim Jae-won, Yeonwoo and Kim Mi-sook.
In 2025, Yoon starred as Seo Gil-geum in the fantasy survival romance television series titled Bon Appetit, Your Majesty, alongside Im Yoon-ah, Lee Chae-min and Kang Han-na.
On November 13, 2025, it was announced that Yoon will star in the upcoming Netflix fantasy romantic comedy series titled Beauty in the Beast, alongside Kim Min-ju, Moon Sang-min and Lomon, which revolves around a freshman student werewolf who—adapted to society—in enrolled at a university and falls in love with a campus senior there.