Actress Sunainaa's claim to fame was Kadhalil Vizhundhen, in which she acted alongside Nakkhul Jaidev. Her pairing with Nakkhul was very much appreciated by the fans. She then starred in Maasilamani with Nakkhul. But, the film didn't help them catapult their careers. Sunainaa then acted in director Seenu Ramasamy's Neerparavai, which was critically acclaimed and even nominated for Filmfare awards. She then went on to act in films such as Samar, Vanmam, Theri, Kavalai Vendam, Thondan, Kaali. She made her digital debut with Nila Nila Odi Vaa, which released on the Viu platform. She then was a part of halitha Shameem's Sillu Karupatti, which fetched her recognition yet again.
Recently, there were rumours doing the rounds that she is all set to get married this year. However in a statement, Sunainaa said that marriage is definitely not on the cards right now and she is completely focused on her career. She also hoped that people would stop writing about her marriage rumours and write about her work instead. Sunainaa is excited about her career now. SHe said, " In the last year and a half, I am getting a lot of offers, especially a variety of roles... Also, some directors have written roles specifically keeping me in mind, which is quite exciting.”