Cho Ha-seul
- Birth Date
- 8/18/1997
- Birth Place
- Bucheon, Gyeonggi-do, South Korea
- Known For
- Acting

Cho Ha-seul (조하슬) also known simply as HaSeul (하슬) is the third revealed member of LOONA and a member of its first sub-unit, LOONA 1/3.

Cho Ha-seul (조하슬) also known simply as HaSeul (하슬) is the third revealed member of LOONA and a member of its first sub-unit, LOONA 1/3.