Her grandmother is Korean actress and politician Son Sook,[4] and her parents met at drama school.

At 15, in family tradition, Ha decided to pursue acting in South Korea,[5] successfully auditioned for Kaywon High School of Arts in Seoul, where she trained for three years.

[8] She made her television debut with a recurring role in the American-French series Reef Break.

[11] She was billed in the main cast of the ABC TV series Troppo as Ah Rah and made her feature film debut in Sissy,[9] the latter of which premiered at the 2022 South by Southwest (SXSW).

[12] She starred in the Stan series Bad Behaviour,[9] a four-part adaptation of the novel of the same name by Rebecca Starford.