- For other people known as 'Haewon', see Haewon.
2021–present: Debut with NMIXX
On July 9, 2021, a teaser was revealed, containing the phrase "Your Next Favorite Girl group" sparking rumors that JYP Entertainment would be debuting a new girl group soon (now known to be NMIXX.)  On November 5, Haewon was revealed as the group's sixth member through a cover of Stephanie Poetri's "I Love You 3000".
The group debuted on February 22, 2022 with the single album "Ad Mare".
- She sang Stephanie Poetri's "I Love You 3000" in her Qualifying video.
- Her MBTI personality type is ESTP.
- She can speak Spanish.