She attended Changwon Kyungil Girls' High before studying at Ewha Womans University from 2011 to 2016, earning a bachelor's degree in sociology.

From 2018 to 2020 she was director of the public relations department at the National Chemical Fiber Food Industry Union.

[3] In August 2020, Ryu was subject to online abuse after wearing a red patterned mini wrap dress and black sneakers in the National Assembly chamber.

She was defended by a number of other politicians and public figures, including former presidential spokesperson Ko Min-jung, who commended her for "breaking the National Assembly's excessively solemn and authoritarian atmosphere".

In an interview with Yonhap, Ryu explained: "In every plenary session, most lawmakers, male and middle-aged, show up in a suit and a tie, so I wanted to shatter that tradition.

[6][7][8] Ryu Ho-jeong raised further controversy with the campaign about the right to practice tattooing,[9] a matter on which history weighs heavily in Korea[a] and that older Koreans still find difficult to accept.

[11] Around June 10, 2021, Ryu Ho-jeong submitted a proposition for a bill to create a professional licence for tattooists,[9] and posed for photos in Seoul's National Assembly complex, showing erasable tattoos on her back.

Ryu and fellow Justice Party member of parliament Jang Hye-young have expressed interest in creating an alliance called the "Third Power."

However by South Korean electoral law, proportional representative MPs can't hold their own seat in parliament if they withdraw from their original party.

In doing so, and in accordance to election law, Ryu also forfeit her role as a proportional representative Member of Parliament for the Justice Party.