She was also a member of Real Girls Project as part of her acting role in The Idolmaster KR.

[1] She attended Hanlim Multi Art School learning Broadcasting & Entertainment Department in Seoul[2] and graduated on 10 February 2017.

In 2014, Lee appeared in the music video of labelmate Hong Jin-young's song "Cheer Up".

[3] On April 12, 2015, she debuted as a member of Music K Entertainment's new girl group The Ark under the stage name "Halla".

On April 26, 2016, Lee joined the auditions for The Idolmaster KR, a Korean drama loosely based on the Japanese raising simulation and rhythm video game series The Idolmaster,[6] where she played the main lead and her twin sister.