Seo Yu-na

Biography

Seo Yu-na (Korean: 서유나; born December 30, 1992), better known by the mononym Yuna, is a South Korean singer-songwriter, actress and yoga instructor. She is a former member of the South Korean girl group AOA and its sub-groups, AOA Black and AOA Cream.

Early life

Seo Yu-na was born on December 30, 1992. She began playing the piano when she was seven years old, causing her to take interest in becoming a singer as an adult. At the age of 18, she traveled to Seoul alone after getting consent from her parents. She transferred schools and stayed at her uncle's house while she went to auditions and practised singing. Her younger sister Yu-ri made her debut in 2014 with girl group Berry Good under Asia Bridge Entertainment, adopting the stage name "Seoyul".

Career with AOA

On July 30, 2012, Yuna made her debut as a member of AOA on Mnet's M! Countdown with their debut single album, Angels' Story and the title track "Elvis". AOA has released three EPs and nine singles as of June 22, 2015. She is part of AOA's subunit "AOA Black". In 2015, AOA traveled to Hainan where they filmed One Fine Day, a variety program in which idols/idol groups go on a "healing" vacation. They were the seventh idol group to appear on the program.
Yuna is also part of sub-unit AOA Cream together with Shin Hye-jeong and Im Do-hwa. The sub-unit released their first teaser on February 1, 2016.
The music video teaser for title track "I'm Jelly Baby" was released on February 4, 2016.
AOA Cream released their title track together with the MV on February 12, 2016.
On January 1, 2021, Yuna's contract expired with FNC Entertainment, and she left the company.

As an actress

Yuna has also had a successful, yet lesser known acting career, as she has played a lead role in the Japanese Musical Summer Snow in 2013, as well as playing another lead role in the comedic Korean web-drama Prince's Prince in February 2015.
On October 20, 2013, Yuna sang for the OST "I'm Ok" for KBS's TV series Marry Him If You Dare. The song "I'm OK" is the theme song for the main character Na Mi-rae.

In October 2016, it was announced that she will be part of the cast of a new web-drama Hot and Sweet playing Joon Young, a part-time food worker. The drama premiered on October 20 and ran for 8 episodes. Yuna also released two songs for the drama, one "Hot and Sweet" a duet with Choi Min-hwan and "Everything" a solo song.
Yuna was then cast in another new web-drama My Old Friend. The drama aired starting in mid-November for five episodes through Naver TVCast.
In 2017, Yuna was cast in the romantic comedy series Single Wife, scheduled for August 23. In June, she sang the theme song for drama My Only Love Song, the song is called "Another You".
Yuna sung the OST for tvN's A Korean Odyssey together with Shin Ji-min, the song is called "If You Were Me×If You Were Me27 June 2018 · SingleSpotify (search)YouTube Music (search)Tracklist · 1 track1If You Were Me3:17" and it was released on January 28, 2018.
In February 2019, Yuna together with Shin Hye-jeong and Im Do-hwa will take part in Lifetime's reality program AOA DaSaDanang Heart Attack Danang where the members will travel to Danang, Vietnam for an adventure. In July, she was cast in web drama Love Formula 11M as So-jin.

As a yoga instructor

After her departure from AOA, Yuna gave an update on her social media and revealed she had transformed into a yoga instructor and living a new life outside of the entertainment industry.

As songwriter, producer and backing singer

In December 2019, FNC Entertainment confirms that Yuna used her pseudonym E.NA to become a backing singer for Shin Yu-na's parts for Itzy's debut single "Dalla Dalla"; she also had credits as a vocalist in the single "Heart Shaker" by Twice.
She is also credited as the backing singer for Cosmic Girls's single "Butterfly".

Marriage

Seo and music composer Kang Jung-hoon, better known as Friday of GALACTIKA, married in Seoul on February 18, 2024. On July 4, 2025, Seo announced her pregnancy via Instagram. Seo gave birth to a daughter on November 27.

Songwriting credits

All song credits are adapted from the Korea Music Copyright Association's (KOMCA) database unless noted otherwise.